This Google Ads glossary explains the 70 terms you will meet in the Google Ads interface, in agency reports and in conversations with paid search specialists. Terms are grouped by where they show up, from account structure to automation, and each definition is written in plain English with a note on why it matters.
Quick answer: Google Ads is organized as account, campaigns, ad groups, and keywords plus ads. You pay per click (CPC) in an auction where Ad Rank decides position, based on your bid, ad quality and context. The metrics that matter most are conversions, cost per conversion (CPA), conversion value and return on ad spend (ROAS). In 2026, Smart Bidding, AI Max for Search and Performance Max automate much of the matching and bidding.
How to Use This Google Ads Glossary
- New to Google Ads: read structure, then keywords, then metrics.
- Reading an agency report: start with metrics, then measurement.
- Fixing a campaign that underperforms: measurement first, then keywords and bidding.
- Evaluating automation: the last section on Smart Bidding, AI Max and Performance Max.
Account and Campaign Structure
- Google Ads account: the container for campaigns, billing and conversion tracking. You should own it, even if someone else manages it.
- Manager account (MCC): an account that links and manages many Google Ads accounts, used by agencies and multi-brand businesses.
- Campaign: the level where you set budget, bidding strategy, networks, locations, languages and goals.
- Campaign type: Search, Performance Max, Shopping, Display, Video, Demand Gen or App, each with different inventory and ad formats.
- Ad group: a set of closely related keywords and the ads that should show for them.
- Networks: where Search ads can appear: Google Search, search partners and, optionally, the Display Network.
- Location targeting: where ads show. "Presence" means people in or regularly in a place; "presence or interest" also includes people searching about it.
- Ad schedule: the days and hours a campaign may serve.
- Labels: tags you attach to campaigns, ad groups or ads to organize and filter them.
Keywords and Search Terms
- Keyword: a word or phrase you bid on to show ads for related searches.
- Search term: the actual search someone typed that triggered your ad. Different from the keyword.
- Broad match: matches searches related to the meaning of your keyword. Widest reach, needs good negatives and Smart Bidding.
- Phrase match: matches searches that include the meaning of your keyword, with word order where it matters.
- Exact match: matches searches with the same meaning or intent as your keyword. Narrowest reach, most control.
- Negative keyword: a word or phrase that stops your ad from showing for searches that contain it. Negatives do not match close variants.
- Shared negative keyword list: a list of negatives you can attach to many campaigns at once.
- Search terms report: the report of search terms that triggered your ads, with cost and conversions. The main place to find wasted spend.
- Keyword Planner: Google's free tool for keyword ideas, search volume ranges and bid estimates.
Bidding and Budgets
- Auction: the process that runs for every search to decide which ads show and in what order.
- Ad Rank: the score that decides position, based on bid, ad quality, Ad Rank thresholds, context and expected impact of assets.
- CPC (cost per click): what you pay when someone clicks. Usually less than your maximum bid.
- Max CPC: the most you are willing to pay for a click under manual bidding.
- Smart Bidding: automated bid strategies that set a bid for every auction using signals like device, location, time and query.
- Maximize conversions: a Smart Bidding strategy that aims for as many conversions as the budget allows, optionally with a target CPA.
- Maximize conversion value: aims for as much conversion value as the budget allows, optionally with a target ROAS.
- Target CPA: the average cost per conversion you want Smart Bidding to aim for.
- Target ROAS: the average return on ad spend you want Smart Bidding to aim for, as a percentage of conversion value to cost.
- Daily budget: the average amount a campaign can spend per day. It can spend up to twice that on a single day, but monthly charges are capped at the daily average times 30.4.
- Shared budget: one budget split automatically across several campaigns.
- Bid adjustment: a percentage increase or decrease for a device, location or time, mostly used with manual bidding.
Ads and Assets
- Responsive search ad (RSA): a Search ad built from up to 15 headlines (30 characters each) and 4 descriptions (90 characters each) that Google combines per search.
- Pinning: fixing a headline or description to a position in an RSA. Reduces combinations; use sparingly.
- Ad strength: Google's rating of how complete and varied an RSA is. Helpful, but not a performance metric.
- Assets: extra pieces added to ads, such as sitelinks, callouts, structured snippets, images, call and location.
- Sitelinks: extra links to specific pages under a Search ad.
- Callouts: short non-clickable lines such as "Free shipping" or "24/7 support".
- Final URL: the landing page a click goes to.
- Responsive display ad: a Display ad assembled from your images, logos, headlines and descriptions.
- Disapproved ad: an ad that violates a policy and cannot serve until fixed or successfully appealed.
Measurement and Conversions
- Conversion: a valuable action after a click, such as a purchase, lead or call.
- Conversion action: a specific action you track, with settings for value, counting and window.
- Primary conversion: used for bidding and shown in the Conversions column.
- Secondary conversion: recorded for reporting in All conversions but not used for bidding.
- Google tag: the tag on your site that records conversions and site activity.
- GA4 key events: the Google Analytics 4 events marked as important, which can be imported into Google Ads as conversions.
- Enhanced conversions: sending hashed first-party data such as email with a conversion to improve matching.
- Offline conversion import: uploading conversions that happen outside your site, such as closed sales in a CRM, back to Google Ads.
- Conversion lag: the time between a click and the conversion being recorded. Reason to judge recent data carefully.
- Attribution model: how credit for a conversion is shared across clicks. Data-driven attribution is the default.
- Customer Match: uploading hashed customer emails or phone numbers to reach, or exclude, people who already know your business.
Metrics and Formulas
| Metric | Formula | What it tells you |
|---|---|---|
| CTR (click-through rate) | Clicks ÷ impressions | How compelling the ad is for the search |
| Conversion rate | Conversions ÷ clicks | How well the landing page and offer convert |
| CPA (cost per conversion) | Cost ÷ conversions | What a result costs |
| ROAS (return on ad spend) | Conversion value ÷ cost | Revenue per dollar spent |
| Search impression share | Impressions ÷ eligible impressions | How much of the available demand you reach |
| Impression share lost (budget) | Share of eligible impressions missed because budget ran out | Whether budget is limiting a campaign |
| Impression share lost (rank) | Share missed because Ad Rank was too low | Whether bids or ad quality are limiting a campaign |
| Quality Score | 1 to 10 per keyword, from expected CTR, ad relevance and landing page experience | Diagnostic for ad and page relevance |
- Optimization Score: an estimate of how well the account is set to perform, driven by how many of Google's recommendations are applied. A to-do list, not a performance metric.
- Auction Insights: a report showing which other advertisers appear in the same auctions and how often they rank above you.
Automation: Smart Bidding, AI Max and Performance Max
- Performance Max: a campaign type that runs across Search, Shopping, YouTube, Display, Discover, Gmail and Maps from one set of goals, assets and signals.
- Asset group: a themed set of headlines, descriptions, images, videos and audience signals inside Performance Max.
- Audience signal: a suggestion, such as a customer list, that helps Performance Max find the right people faster. Not a hard target.
- Brand exclusions: a setting that keeps a campaign from serving on chosen brand searches.
- AI Max for Search campaigns: a setting that adds search term matching beyond keywords, text customization and final URL expansion to a Search campaign.
- Final URL expansion: lets Google send a click to the most relevant page on your site instead of the chosen final URL.
- Learning period: the time after a new bid strategy or large change while Smart Bidding recalibrates.
- Campaign experiment: a test that splits traffic between the original campaign and a changed version to measure the difference.
- Recommendations: Google's suggested changes. Many increase spend; review each one.
- Ads agent: AI software working on your side of the account that audits, drafts and executes changes with your approval, such as Loraloop's Angie.
Frequently Asked Questions
What is the difference between a keyword and a search term?
A keyword is what you bid on. A search term is what someone actually typed. With broad matching, one keyword can trigger hundreds of different search terms, which is why the search terms report matters.
What is a good Quality Score?
Seven or above is generally healthy, but Quality Score is a diagnostic, not a goal. Look at its three components for keywords that carry real spend and fix the one marked below average.
What is the difference between CPA and ROAS?
CPA is cost divided by conversions and suits conversions of similar value, such as leads. ROAS is conversion value divided by cost and suits conversions with different values, such as online orders.
What is Ad Rank?
Ad Rank decides whether and where your ad shows. It combines your bid, the quality of your ad and landing page, Ad Rank thresholds, the context of the search and the expected impact of your assets.
What is the difference between Performance Max and AI Max?
Performance Max is a separate campaign type that runs across all Google channels. AI Max is a setting inside a standard Search campaign that widens matching and adds generated copy and URL expansion.
Want the terms put to work? Angie reads your Google Ads account every night and explains, in plain English, what changed and what to approve.
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