SERP stands for Search Engine Results Page. If you want to extract information from the Google Search page, you will need to use a third party API or a service like ahrefs, SEMRush which extract keyword ranking information from the results pages.
In this article, I will list the best SERP API services which you can use in your application to extract SERP data from the search engine.
I will keep the list updated whenever I find a new service. By the way, my personal favorite is SerpAPI because I can use its API in Google Sheets.