How does mobile first indexing affect SEO?

[thaichacha]

How does mobile first indexing affect SEO?

[John-Smith]

Mobile-first indexing means that Google will use the mobile version of the page for indexing and ranking, to better help our — primarily mobile — users find what they're looking for.” In short, Google is crawling the web as a smartphone browser would render your website, as opposed to how a desktop browser would.

[PrimeItSolution]

Mobile-first indexing means Google will predominantly use the mobile version of the content for indexing and ranking. Historically, the index primarily used the desktop version of a page's content when evaluating the relevance of a page to a user's query.