SEO and PPC overlap whenever your ads and your organic listings show for the same searches. The overlap creates a question (are ads taking clicks you would have had anyway?) and an opportunity (each channel produces data the other can use). Teams that plan the two together tend to spend less and learn faster.
What each channel can give the other
- PPC to SEO: which queries convert, which headlines get clicks, and how new landing pages perform before you invest months in ranking them.
- SEO to PPC: Search Console query data, pages that already convert well organically, and a cheaper source of traffic where you rank strongly.
- Both: shared negative and positive keyword lists, a single view of search demand, and consistent messaging on the results page.
Deciding where to spend
A common approach is to compare paid and organic performance query by query. Where you rank first organically with no competing ads, paid clicks may add little. Where competitors or rich results push your organic listing down, ads may still earn their keep. Where you do not rank at all, PPC can fill the gap while content is built.
The only reliable way to measure the overlap is a test: reduce paid spend on a set of keywords or regions and watch combined clicks and conversions.
AI answers change the picture
AI Overviews and AI Mode take space on some results pages, and ads can appear in or around them. How this shifts the split between paid and organic clicks is still being measured and differs by query type, so watch your own data rather than relying on general claims.
Example
A shared keyword sheet
Hypothetical company Mossgrove’s SEO and paid teams keep one keyword sheet with organic rank, paid impression share and conversion data per query. They pull back paid spend on terms where they rank first organically without competing ads, and send paid search budget toward terms where they do not yet rank.
Common mistakes
Separate teams, separate truths
When SEO and PPC report different conversion definitions, neither can judge the overlap. Agree on shared definitions first.
Questions
Google states that advertising does not influence organic ranking. Any link is indirect, such as more brand searches over time.
