Glossary of the most common Google Ads related terms.
Google Ads includes a wide range of settings, terms and performance metrics that can be difficult to understand, particularly when you are setting up or managing campaigns yourself.
This Knowledge Hub explains the key parts of Google Ads in straightforward language, including campaigns, Ad Groups, keywords, match types, bidding, budgets, conversion tracking, advert performance and Google Ads assets.
Use the contents below to find the topic you need. Where a subject needs more explanation, you can follow the links to a more detailed guide.
Table of Contents:
A campaign is the foundation of your advertising, housing a set of ads with a shared budget, location targeting, and a specific marketing objective (such as driving website traffic or generating leads).
Read my guide to structuring Google Ads campaigns
Groups of closely related keywords and adverts within a Google Ads campaign, usually organised around a specific product, service or theme.
Google’s network of search results, websites, apps, YouTube and other platforms where adverts can appear.
Learn how the Google Ad Network works, including the challenges as well as the benefits.
A keyword is a specific word or phrase that you choose to target within your Google Ads account. You are essentially telling Google, “When someone types this exact phrase into the search engine, I want my advertisement to enter the auction.” Choosing the right keywords requires balancing search volume with commercial intent. For example, “plumbing tips” might get a lot of searches, but “hire a plumber near me” shows a direct intent to spend money. Your keyword list should focus heavily on phrases that indicate the user is actively looking to make a purchasing decision, allowing you to reach your intended audience efficiently.
While a keyword is the ideal phrase you bid on, a Search Term is the actual, real-world phrase a user inputted into the Google search engine that triggered your ad. Because of Google’s various matching algorithms, your keywords and the resulting search terms are rarely identical. For instance, you might bid on the keyword “roof repair”, but the user’s actual search term was “can I do my own roof repair for free”. Monitoring your Search Terms report regularly is vital to understanding exactly what you are paying for, allowing you to refine your targeting and prevent wasted budget on irrelevant queries.
Broad Match is Google’s default keyword setting, designed to give your ads the widest possible reach. It allows your ads to trigger for a vast variety of searches, including synonyms, related concepts, and variations of your target keyword. For example, a broad match keyword for “low-carb diet plan” might trigger an ad for “calorie-free recipes”. While it can drive a high volume of traffic, small businesses should use Broad Match with extreme caution. Because the targeting is so loose, it is incredibly easy to waste your budget on irrelevant traffic unless it is paired with a very comprehensive list of negative keywords.
Phrase match is a keyword setting that triggers your ad when a user’s search query includes the core meaning of your keyword, even if additional words are added before or after it. It offers an excellent middle ground, providing a good balance between the strict control of Exact Match and the overly wide reach of Broad Match. For example, if your phrase match keyword is “emergency plumber”, your ad could show for “local emergency plumber” or “emergency plumber costs”, but it would not show for “plumbing supplies”. It is highly recommended for advertisers who want targeted traffic but still wish to capture long-tail variations.
Exact match is the most highly restrictive keyword setting available in Google Ads. It tells Google to only show your advertisement when a user’s search query matches your keyword exactly, or is a very close variant with the exact same intent. Because it stops Google from taking creative liberties with your keywords, it gives you the tightest possible control over your advertising budget. For small businesses with limited funds, Exact Match prevents wasted spend on completely irrelevant searches, ensuring every penny goes towards highly qualified leads. While your overall traffic volume will be lower, the traffic you do receive will be much more likely to convert.
Negative keywords are specific words or phrases that you add to your campaign to actively prevent your ads from being shown. When a user’s search query contains one of your negative keywords, Google will automatically block your ad from entering the auction. For example, if you sell high-end furniture, you might add “cheap”, “free”, or “second-hand” as negative keywords. This ensures your budget is not wasted on users looking for bargains. Regularly reviewing your search terms and adding irrelevant queries to your negative keyword list is one of the most critical maintenance tasks for ensuring better targeting and long-term campaign profitability.
Searches that generated impressions, clicks and spend, but which Google does not reveal individually. This limits your ability to judge relevance, add negative keywords and prevent similar wasted spend.
Your budget is the specific amount of money you allocate to a Google Ads campaign on a daily basis. It acts as a spending target to control your overall advertising costs. However, Google’s budget pacing rules dictate that you might spend up to twice your daily budget on days with high search volume, allowing the algorithm to capture high-converting opportunities. To protect your finances, Google enforces a strict monthly cap: your daily budget multiplied by 30.4 (the average number of days in a month). So, while your daily spend will fluctuate to match consumer demand, you will never pay more than your absolute monthly limit over the course of a billing cycle.
A bid is the maximum amount of money you are willing to pay each time someone clicks on your advertisement. When a user searches for a target term, Google runs a lightning-fast auction to decide which ads to show. Your bid, combined with your Quality Score (how relevant and useful your ad is), determines your Ad Rank and overall visibility on the page. If you bid too low, your competitors will push your ad off the first page entirely; if you bid too high without good ad relevance, you could waste money. You can either set bids manually for granular control or let Google’s automated bidding strategies manage them dynamically on your behalf.
Cost Per Click (CPC) is the actual price you pay out of your budget each time a user clicks on your advertisement. Crucially, your CPC is often lower than your maximum bid. The Google auction only charges you the minimum amount necessary to beat the Ad Rank of the competitor immediately below you. Managing your CPC is a critical factor in ensuring your ad campaigns remain profitable and that you are getting a strong return on investment. The best way to reduce your CPC without losing visibility is by improving your Quality Score through highly relevant ad copy and a seamless landing page experience.
Maximize Clicks is an automated bidding strategy where Google automatically sets your bids to help you get as many clicks as possible within your defined daily budget. It is highly effective for driving large volumes of traffic quickly or building initial brand awareness for a new product. However, it does not evaluate the quality or conversion likelihood of those clicks. Because the algorithm’s only goal is volume, you risk attracting low-intent visitors who may just be browsing. It is a great starting point for brand new accounts that need to gather data, but advertisers focused on lead generation should eventually transition to a conversion-focused strategy.
Maximize Conversions is a powerful, automated “Smart Bidding” strategy where Google uses advanced machine learning to set bids, aiming to get you the most conversions (like website enquiries, phone calls, or product sales) possible for your budget. Rather than just chasing raw traffic, the algorithm analyses historical data, device types, and user behaviour to predict which clicks are most likely to result in a valuable action. However, it requires highly accurate conversion tracking to be set up correctly on your website to function. Once the algorithm has enough data, this strategy is generally the most profitable option for service-based businesses.
An impression is counted every single time your advertisement is rendered and displayed on a user’s screen, regardless of whether they actually click on it. While impressions do not directly cost you money (unless you are running a specific CPM Display campaign), monitoring them is essential for measuring the overall visibility and reach of your account. If your campaign is generating thousands of impressions but very few clicks, it is a strong indicator that your ad copy is not compelling enough or your keyword targeting is too broad. Conversely, if your impressions are painfully low, you may need to increase your bids or expand your keyword list.
The percentage of impressions an ad receives compared to the total number of impressions it was eligible to receive.
Learn how Ad Impression Share works and how to improve it.
Click-Through Rate (CTR) is a vital percentage metric calculated by dividing your total ad clicks by your total impressions. It shows exactly how often people who see your ad actually click on it. A “good” CTR varies wildly by industry, but a high CTR strongly indicates to Google that your advertisement is highly relevant and helpful to users. Because Google only makes money when users click, they reward ads with high CTRs by lowering their Cost Per Click and boosting their position on the page. Improving your CTR through better ad copy is one of the most effective ways to reduce your advertising costs.
Your Conversion Rate is the percentage of users who take a valuable, desired action (such as submitting an enquiry form, calling your business, or making a purchase) after clicking on your ad. If 100 people click your ad and 5 of them fill out your contact form, your conversion rate is 5%. A high conversion rate is the ultimate indicator of a successful campaign. If you have a great Click-Through Rate but a terrible Conversion Rate, it usually means your ad copy is making a promise that your landing page fails to deliver on, or your website is too difficult for mobile users to navigate.
Conversion Tracking is a small snippet of code (or tag) placed on your website that monitors exactly what users do after clicking your Google Ad. Without conversion tracking, you are essentially advertising in the dark—you can see how much money you spent on clicks, but you have no idea which keywords actually generated sales. Setting up accurate conversion tracking is the single most important technical step in Google Ads. It not only proves your Return on Investment (ROI) but also feeds critical data back into Google’s machine learning algorithms, allowing you to use automated Smart Bidding strategies like Maximize Conversions.
Quality Score is a diagnostic metric on a scale of 1 to 10 that Google uses to evaluate the overall relevance and quality of your ads, keywords, and landing pages. A score of 10/10 means Google thinks your ad provides a perfect user experience. Your Quality Score acts as a massive discount multiplier in the ad auction; advertisers with high Quality Scores can actually pay significantly less per click than competitors who bid more money but have poor ads. You can improve your score by ensuring your keywords appear naturally in your ad copy and by directing users to a fast, highly relevant landing page.
Ad Rank is the hidden, behind-the-scenes score Google calculates during every single search auction to determine where your ad appears on the results page, or if it appears at all. It is calculated in real-time based on several factors: your maximum bid amount, your Quality Score, the expected impact of your ad extensions, and the context of the user’s search. Simply bidding the most money does not guarantee the top spot. A smaller business with a highly relevant ad and a fantastic landing page can consistently outrank a massive corporation with a larger budget but a poorer user experience.
Ad relevance is a core component of your Quality Score. It measures how closely the keywords you are bidding on match the message in your ad text and the intent behind the user’s original search query. If you bid on the keyword “emergency roof repair” but your ad copy just says “General Builders in London”, your ad relevance will be marked as “Below Average”. To fix this and lower your costs, you must organise your account into tightly themed ad groups, ensuring that the specific service a user searches for is immediately reflected in the headline of your advertisement.
Ad position historically referred to the exact numerical placement of your advertisement on the search engine results page (e.g., Position 1, Position 2). However, Google has retired the concept of average numerical position. Instead, they now focus on “Absolute Top” (the very first ad above the organic search results) and “Top” (any ad shown above the organic results) metrics. While appearing at the Absolute Top generally yields the highest Click-Through Rate, it is often much more expensive. For small businesses on a strict budget, fighting for the absolute top position can drain funds quickly; aiming for a slightly lower, more cost-effective position is often more profitable.
Ad copy refers to the actual text content within your advertisement—the headlines and descriptions that convey your message and value proposition to potential customers. In a crowded search results page, your ad copy is your only opportunity to stand out from your competitors. Great ad copy should clearly highlight the benefits of your service, address the user’s specific problem, and include the exact keywords they searched for. Well-written copy directly improves your Click-Through Rate (CTR), which signals to Google that your ad is highly relevant, ultimately lowering your Cost Per Click.
A Call-to-Action (CTA) is a specific phrase or directive within your ad copy that explicitly tells the user what you want them to do next. Examples include “Call Now for a Free Quote”, “Book Your Appointment Today”, or “Buy Online for Next Day Delivery”. A strong, clear CTA removes any ambiguity for the user. Without it, people might read your ad but scroll past because they aren’t prompted to take the next step. Including a sense of urgency in your CTA is one of the easiest ways to improve your overall conversion rates.
Content used to build and enhance a Google Ad, including headlines, descriptions, sitelinks, images, phone numbers and location information.
Learn how Google Ads assets work and which types to use.
Your landing page is the specific webpage that users are directed to immediately after they click on your Google Ad. It is the bridge between a searcher’s interest and your actual business. A common mistake is sending all ad traffic to a generic homepage. Instead, your landing page should be highly tailored to the specific ad the user just clicked. If they clicked an ad for “boiler repair”, the landing page must immediately talk about boiler repair, feature a clear Call-to-Action, and load incredibly quickly on mobile devices. Google actually grades your landing page experience as part of your Quality Score.
Dynamic Search Ads (DSAs) are advertisements generated automatically by Google based on the actual content of your website. Instead of you manually selecting keywords and writing headlines, Google’s algorithm crawls your site, matches a user’s search query to a relevant page, and dynamically generates an ad headline on the spot. This is highly useful for large e-commerce websites with hundreds of products, as it fills in the gaps that manual keyword targeting might miss. However, small service businesses should use DSAs cautiously, as you lose a significant amount of control over your ad messaging.
Ad rotation is a campaign-level setting that dictates how often different ads within the same ad group are shown relative to one another. Best practice is to have at least three different ad variations in every ad group so you can test different headlines. You can set Google to “Optimise,” where the algorithm automatically identifies and shows your best-performing ad most frequently. Alternatively, you can set them to rotate evenly if you want to run a strict manual A/B test to see exactly which message resonates best with your target audience before picking a winner.
The Ad Preview and Diagnosis tool is a built-in feature within Google Ads that allows you to see exactly how your ads appear in live Google search results, without actually accumulating false impressions or accidentally clicking your own ads (which wastes your budget). It is an incredibly useful troubleshooting tool for diagnosing why an ad might not be showing for a specific keyword, or for seeing what your ads look like to users searching from a different geographical location, such as a different city.
Google Ads Experiments is a feature that allows advertisers to safely test changes to their campaigns in a controlled environment before fully implementing them. For example, if you want to see whether changing your bidding strategy from Maximize Clicks to Maximize Conversions will improve your ROI, you can run an experiment. Google will split your budget evenly between your original setup and your experimental setup, running them side-by-side. After a few weeks, you can review the data and permanently apply the winning strategy without risking your entire budget on a guess.
Ad performance metrics are the quantitative data points used to evaluate how successfully your ad campaign is running. While Google provides dozens of data columns, small businesses should focus on a few key metrics: Click-Through Rate (CTR) to measure ad relevance, Cost Per Click (CPC) to monitor expenses, and Conversion Rate to measure actual lead generation. Monitoring these specific numbers helps business owners understand exactly where their budget is going and whether their advertisements are actually generating a profitable return on investment.
The Google Merchant Centre is a separate platform from Google Ads that allows retail businesses to upload and manage their physical product data (including product titles, descriptions, images, and current prices). It acts as a central database for your inventory. Once your product feed is approved in the Merchant Centre, you can link it directly to your Google Ads account to start running Google Shopping Campaigns, allowing your products to appear visually at the top of the search results.
Google Shopping Campaigns are a specific type of ad campaign focused heavily on promoting physical products directly within the search engine results page. Unlike standard Search ads which are entirely text-based, Shopping ads showcase a high-quality image of your product, the current price, and your shop name before the user even clicks. This format drives incredibly high-intent traffic because users already know what the product looks like and how much it costs before they click, leading to excellent conversion rates for e-commerce businesses.
It is very common to confuse Google Ads and Google AdSense, but they serve entirely opposite sides of the advertising market. Google Ads is the platform for businesses who want to *buy* advertising space to promote their products or services. Google AdSense, on the other hand, is a monetisation programme for website owners and bloggers who want to *earn* revenue by allowing Google to host those advertisements on their own web pages. If you are a business looking for customers, you need Google Ads.
Google Ad Grants is a specific philanthropic programme run by Google that provides eligible, registered non-profit organisations with free advertising credit (typically up to $10,000 per month) to use on the Google Search Network. It allows charities to raise awareness, recruit volunteers, and drive donations without spending their own vital funds. However, Google enforces very strict account management rules and minimum performance metrics to ensure the free credit is being used effectively, meaning Grant accounts require careful, ongoing maintenance.
A Google Ads Certification is a professional, official accreditation offered directly by Google to individuals who demonstrate a high level of proficiency in digital advertising. To earn it, marketers must pass rigorous examinations covering search, display, video, and measurement. For small business owners looking to outsource their account management, asking if an agency or freelancer holds a current Google Ads Certification is a good way to verify their expertise and ensure they are up to date with the platform’s latest best practices.