how to search through repository?

I assume this is already solved by tools such as :grep, but I wasn't able to find great documentation on this. How do you recommend searching through an entire repo for a search phrase. Currently using cmd + sft + f in Atom, so would love to replace that functionality... Thanks!

Start by reviewing the repository's existing documentation and Vim configuration for any search-related guidance. Determine how repository-wide phrase searching is currently handled and document a recommendation that addresses the Atom-style search use case. Done means a newcomer can find and follow the documented approach.

Written by the indexing model from the issue text.