These forums are where you talk to other users of the specific Adobe programs that you use
-Here is the list of all Adobe forums... https://forums.adobe.com/welcome
I have no idea how you learn marketing
These community forums won't help you market yourself if that's what you're asking. See the paragraph about self-promotion in the forum Guidelines. Guidelines & Tips for the Adobe Forums
The benefits derived from forum participation largely depend on you. Most active forum members have acquired a deeper understanding of Adobe products & workflows. And they share that knowledge with other Adobe product users.