So, there's been a bunch of changes since the last time I posted this, including the name change. As I said in that snap, DueProps is, explained simply, a platform that allows managers and employees to award eachother via 'props', embracing positive reinforcement and boosting productivity, all underlined with a game aspect.
The feed, or the 'Activity,' is just the most recent props given to your coworkers. By default, your Activity feed shows items regarding the people you follow. You can bring down the dropdown menu by clicking "Following," and you'll have a choice to pick between different departments of your company, just the people that you're following or everyone.
When someone awards you a new prop, you're greeted with a "New Delivery" notification, which will nest itself under the items in the left sidebar until you accept said prop. Sometimes you'll have a choice to pick between various props.
Starbursts in the corner of feed items are the votes a user has received for that particular prop. Clicking "Vote Up" will increase that number by whatever that prop's point value is.
The profile card in the top-right is still a work in progress, but it's basically a quick preview of how you're doing on DueProps.
I think the rest is pretty straightforward. :)