The % key is one of the best features of vim: it lets you jump from { to }, [ to ], and so on.
Howeve
I have found this technique very useful for going to the start/end of a very long quoted string.
vi" or vi'othis actually takes the cursor next to the start/end quote character, but still feels pretty helpful.
Adding Stefan's excellent comment here which is a better option for anyone who may miss the comment.
If you use va" (and va') then it will actually visually select the quotes itself as well.
– Stefan van den Akker