You want to create an event category. Find out in this article how to do it.
If you don't know what is an event category, please read our article What is an event category?
Step 1
In your organization dashboard, go to " MANAGE ", then click on " Event categories ".
Step 2
Click on " Add a category ".
Step 3
Enter a name, write a description (optional) and click on " Save " to save the changes.