By default, Discover shows you all created content on your network, but sometimes you only want to see specific information. Using filters is a good way to narrow your Discover's content down to just the information you want.
Discover shows Everything (meaning All content) by default. To filter according to content type, click the Show list, then select from the specific content types on the list.
When you click the Show list on Discover, you'll see the following filter options:
For example, when you select Boards from the list, Discover will only show the Boards created on your network.