Hi Lily - welcome to Dooster! We're glad you're here.
Tags are an easy way to find your projects in the future, and to
group them together by like subject. Kind of like a grocery list of
your projects - easy reminders of what you made the projects for in
the first place, making the projects easier to find later.
Tags are one-word reminders of what your project is related to.
So you could tag your project involving a trip to Bermuda with
"Bermuda" and "travel", if you want to refer back to the project
later for tips to use for a future trip. Hope that helps!
For more information on how to set up your tags, go here.