We restructured our forum around the time of this topic - moving from 16 categories to 3 - shared more info about it here:
We’ve spent a fair amount of time making sure topic titles are reflective of the topic, and that things are tagged correctly.
Each month, we also export the top results we ranked for in Google Search console and manually review the topics - checking that if they have a solution, they’re marked as solved, and if they don’t have a solution, providing one. The assumption is, that if those are ranking regularly, and we don’t have a solution, people are less likely to return as they didn’t find value.
Here’s a little preview of our Google search results before and after making adjustments While this did work for us, I’m no SEO expert, so can’t say if this will work for others