[@robin-w Moderator 2 years, 3 months ago]

you want the forum id

go to

dashobard>forums>all forums>select the forum and then hover the edit of the forum

in the bottom left you will see something like

example.com/wp-admin/post.php?post=12345&action=edit

12345 is what you need to enter eg

[bbp-single-forum id='12345']