How Google SERPs work and what drives click potential

Executive overview

Most SEO newcomers focus on rankings without understanding what the results page itself shows or how Google decides its layout. Google matches queries against its crawl index, then applies a ranking algorithm to surface the most relevant results — and the layout changes depending on query intent.

Understanding search volume alone is not enough. Click potential measures how much of a keyword's traffic is actually captured by page-one results, which is the number that determines real opportunity.

What the SERPs are

• SERP = Search Engine Results Page — the page returned after any search query
• Google crawls and indexes websites, then queries that index to return results
• Layout varies by query type: informational, buying, or service queries each trigger different features
• Features include: organic results, sponsored ads, People Also Ask, Knowledge Panel, image carousels

How query intent changes the SERP

• Informational query (e.g. "what are the SERPs") → text results, Knowledge Panel, People Also Ask
• Ambiguous query (e.g. "men's shoe size") → minimal commercial features
• Buying query (e.g. "men's shoe size 9") → sponsored links, image carousel, product results
• Service query (e.g. "SEO services") → sponsored ads dominate above organic results

Search volume and click potential

• Search volume = number of monthly searches for a keyword
• Click potential = share of that search volume captured by page-one results
• Use Semrush Keyword Manager to look up both metrics per keyword and per country
• US search volume for a keyword typically exceeds UK volume for the same term
• Keywords Everywhere provides a secondary volume estimate and related keyword ideas
• Rely on Semrush data as primary source; use Keywords Everywhere for directional context only