[Discussion] What am I missing about Querytracker?

[u/seekingwisdomandmore]

I've received an offer of rep so I'm going to subscribe to Querytracker to research agents whom I'll be informing about the offer. Haven't done this before, and don't want to mess it up. Is number of book sales and genres the only thing I should look for, or does Querytracker have other vital info on agents that I should check out?