If a website’s search engine saturation with respect to a particular search engine is 20%, what does it mean?

Question: If a website’s search engine saturation with respect to a particular search engine is 20%, what does it mean?

1.20% of the webpages of the website have been indexed by the search engine

2.Only 20% of the pages of the website will be indexed by the search engine

3.20% of the website’s pages will never be indexed

4.The website ranks in the first 20% of all websites indexed by the search engine for its most important search terms

Answer:1