Please Check The Diagram Of a SERP page(Google)
Just below the Search Box Google show ads for a search term. In this section google can show upto 7 ads. This Ads are paid search result.
After this google show Local business listing. Google show maximum 3 local business listing. This local business listing is Unpaid Search result.
After Google local listing we get 10 search snippet. This 10 search snippet list according to merit because of their relevance to the search terms.
Again google show maximum 4 Ads. This ads also Paid Search.