The Details section in the tournament admin is where you can set the following:
Short URL (a shortened URL to access your tournament page)
Venue Address (for in-person tournaments)
Primary Contact Method (how you want attendees to contact you; can choose between Discord or Email)
Tournament Profile Image
Tournament Banner Image (see our banner image requirements here)
Rules (that will display at the bottom of your tournament homepage)
To change the description of your tournament and the layout of the tournament home page, you'll want to use our homepage editing widgets!
You can find more info on how to format your tournament homepage using widgets here.