So the first thing this addon does is to add a new field in the event submission form. But what are tags? Tags are generally the keywords related to your event. You can add all the keywords that describe your event, event type, subject, or anything that is relevant to your event.
User will be able to filter events by tags they are interested in via a tag cloud shown within the [events] shortcode. As I mentioned earliers, tags make the user search easier, narrowed down.
Admin can manage a few settings related to tags from the backend which can reflect to frontend as well as backend too. You can enable or disable the tag archives and also set the tags filter type.
Admin can also change the settings related to tags that are applicable when you allow front end submission and let the users submit their listings. You can specify the maximum number of tags that can be added, and you can set the delimiter that will be used to separate one tag from the other while front end submission.