How the ad auction decides who shows and what you pay
Learn why a competitor can bid less and still appear above you, and how to inspect quality before raising your bid.
5 min read · Reviewed · AdvisorPPC editorial team
Read as MarkdownA bid is only part of the auction
A search creates a new opportunity for eligible ads to compete. Ad Rank decides whether an ad can appear and where it appears. The bid matters, alongside auction-time ad quality, thresholds, competition, search context and the expected effect of ad assets. There is no position you can buy once and keep. Start an account review by asking what changed in the search and the offer, rather than assuming a higher bid will solve the problem.
Sources: Google Ads Help: About Ad Rank
Inspect relevance before spending more
Google assesses expected click-through rate, ad relevance and landing page experience as parts of ad quality. Treat these as a useful review checklist: does the ad answer the search, and does its destination deliver the same promise? For a local service, consider whether the page names the service and the area clearly. This is a way to investigate the experience, rather than a promise that an edit will lower your costs.
Sources: Google Ads Help: About Ad Rank; Google Ads Help: About Quality Score for Search campaigns
Read Quality Score as a diagnosis
Keyword Quality Score uses a scale from 1 to 10. It summarises historical quality signals and helps you find weak components. The score itself is not an input to the live auction. Use the component ratings to choose what to inspect next, rather than treating the number as an auction formula. Write down the keyword, the weakest component and the page you plan to review before you decide whether any change is justified.
Sources: Google Ads Help: About Quality Score for Search campaigns
Separate your bid from the click price
Actual cost per click is the amount charged for a click. It is often below the maximum CPC bid. Pricing considers the rank threshold and competing ads, so beating the ad below you is only part of the explanation. Do not calculate a competitor's bill by multiplying bid by Quality Score. When reviewing performance, compare the actual CPC column with the bidding settings instead of assuming the bid is the charge.
Sources: Google Ads Help: Actual cost-per-click (CPC): Definition
Make a review plan
Choose a keyword whose quality component needs attention. Read its ad and landing page together. Note whether they answer the same customer need, then propose a focused edit you could evaluate later. Keep the bid unchanged while you decide what evidence would justify changing it. This checklist is a suggested working method, not a claim about guaranteed ranking or savings. Record your reasoning so the next review starts with a clear question.
Sources: Google Ads Help: About Quality Score for Search campaigns
Worked example
Example account: a plumbing company bids $6.00 on emergency plumber and sees Quality Score 4. A rival bids $4.50, has a score of 8 and appears higher. These invented figures illustrate why bid alone cannot explain placement; they do not reproduce Google's auction formula. In your review, first ask which quality component is weakest. Then read the relevant ad and landing page. Draft a clearer service message if the evidence supports it, and decide how you would assess that edit before changing spend.
Try it in your account
Connect your account first. Review the answer before deciding what to change.
Which of my keywords have a Quality Score below 5, and which component is weakest: expected CTR, ad relevance or landing page experience? Read only; do not change anything.
Before you move on
- Distinguish bid, Ad Rank and actual CPC.
- Inspect the quality components before proposing a bid change.
Terms to know
- Ad Rank
- The values used to decide whether an ad shows and its position.
- Quality Score
- A keyword-level diagnostic of historical ad quality.
- Cost per click (CPC)
- The amount charged for a click.