what is the best setting
If there would be a "best setting", then there would be only one setting: The best.
It's an individual decison and depends on several factors.
we have SQL server 2019 and I have task to fine tuning all indexes around 3000 . I noted most of the DB fill factors set to 75 and 80 and some are 0. what is the best setting we should provide in base line level
Apologies for my rudeness. When I was unifying the posts this afternoon, the browser didn't expand the comments, so I didn't see the time. Although I replied myself, I was busy with other things that kept me from reading the details of this post.