Find in files is also known as find all and as multi-file search: it searches across multiple files.

First, open vim at the current directory (or at a specific file).

C:\temp> vim .     

Second, run vimgrep to find the word "foobar" within all files.

:vimgrep /foobar/ **/*

That vim command will do the following:

  1. find all the files that contain the word "foobar"
  2. add those files to the quickfix list
  3. jump to the first instance of the word "foobar"

Third, open the quickfix list to view the files.

:copen

Fourth, within the quickfix list, use the j k keys to select a file, then press enter to open it.

Finally, close the quickfix list.

:cclose

That's enough to get started.