If I enter site:domain.com in Google search I see the index page of a site but it doesn't go as #1 result in SERP, but rather 3 or 5th...
What does that mean, why other pages outrank the index page and how to fix that to have my index page ranked as #1 in there?
Home/index page not appearing 1st in a site:search doesnt mean there is something to fix. Please see the comment here >
How are Google search results ordered when prefixing a search with "site:"
For example, while the homepage is often first, it doesn't have to be, and it's not a sign that something is broken on the website when it isn't. A site:-query without keywords is a very undefined query, so I wouldn't expect anything particular all the time
