"Your tags are stored in either a TAGS (Emacs) or tags (Vim)
file. To use the tags in Vim once they've been generated, fire up
one of your source files in Vim (or use vim -t tagname to start at
a particular tagname), and use :ta tagname to jump to a tagname, or
Ctrl-] to jump to the tag under the cursor. Ctrl-T will return you
to where you were before."