Thank you, @allieber! This is so important.
I added to the Support category description based on your suggestions. The Features category description didn't have any guiding questions and I added your suggestions with minor tweaks.
If you or anyone else has any suggested wording changes or additions/removals, please suggest!
Does anyone have any recommendations for making these posts more visible? They're pinned at the top of their respective categories but I don't know how obvious it is that they should be read. 