What a SERP is
SERP stands for Search Engine Results Page, the page you see after typing a query into Google or another search engine. Every search returns a SERP, and no two are identical because Google tailors the layout to the intent it reads behind the query.
A decade ago a SERP was ten organic links and a few ads. Today it is a crowded page where organic links share space with paid ads, a local map pack, image and video carousels, featured snippets, AI Overviews, related questions, and shopping listings.
The parts of a modern SERP
At the top you often find paid search ads, marked as sponsored, followed sometimes by an AI Overview and a featured snippet. For local queries a map pack of three businesses appears high on the page. People Also Ask boxes expand into related questions. Image packs, video results, and shopping carousels interrupt the list depending on intent.
Only after all of that do the standard organic links begin. On a feature-heavy SERP, the first true organic result can sit well below the fold on a phone.
Why SERP layout shapes strategy
Ranking number one in the organic results means less than it used to if four features sit above you. Understanding which features appear for your target queries tells you what to actually compete for: a snippet, a map pack slot, an Overview citation, or a video result.
Two queries with the same volume can be worth very different amounts depending on their SERP. A query whose SERP is dominated by ads and an Overview may pass little organic traffic, while a query with a clean ten-link layout can be a real opportunity.
How to read a SERP before you target it
Before committing content to a keyword, search it yourself and study the SERP. Note the features present, who ranks, and what format those pages take. The SERP is Google telling you what kind of answer it wants. Matching that format, whether it is a comparison, a how-to, or a local listing, is half the battle.