I occasionally visit that page, It's still not that clear to me but this post did help a lot and clarified somethings that I didn't understand previously. The only way I vote on proposals is when I see it on my feed with vote for the proposal at the footer of the page. I'll take your advice I visit the proposal tab every week to familiarize myself with the projects submitted for funding.
RE: Content isn't the only thing you can vote on with Hive