Tags can be a useful feature in the Instant Feedback to help find notes related to specific issues later on. For instance, let's say you used the tag "projectmeetings" over the course of several weeks/months and now you want to see only notes where that specific tag was mentioned.
First, go to the Instant Feedback page and click the Show filters link.
Now, you can search for the specific tag you're looking for. In the example below, we are looking for everything submitted with the "projectmeetings" tag in the last 14 days.