Hi @cstrange - Our yearly target is 75% best answer. It does take cleanup efforts, including reaching out to those who it’s unclear if they got an answer. 

While it’s not exactly a benchmark, we often say that targeting 60% is a good baseline if Q&A and self-service are important use cases for your community.  As you say, @cstrange, it does require effort and it’s not always realistically possible to pick a best answer for every topic, for a variety of reasons.  We have seen communities who maintain a 100% best answer rate - but this requires very heavy curation and moderation and is really only possible if you convert topics that can’t have a best answer into a conversation.  In general, though, 60% and above is very good and gets you to a good place in comparison with many other communities.  And @Chris Hackett - indeed, 75% is a great target.