When you find yourself having to operate on a certain string, you may first search for it:
To change it you will usually use a repeatable operation such as
ciw followed by whatever you are changing it to.
Now to repeat that change you will first jump to the next search result using
n then press the
. operator to repeat the change. But if you know that you are going to do that there’s an easier way:
cgn. Then just press the
. and Vim will jump to the next match and change it for you.
According to Vim’s help:
gn- Searches forward for the last used search pattern, like with
n, and starts Visual mode to select the match.
for more info:
:h gn or :h gN (for searching backwards)
Note: this also works with
* which searches for the word currently under the cursor.