Badges are icons you're able to collect on your Fitbit profile for reaching certain milestones, both for daily and lifetime totals. You can see which badges you've already earned by looking at the right-side panel of your Dashboard and clicking the “See all” link. This will also show you what the next badges you can earn are, though you’ll have to keep stepping to find them all! Some badges can also be unlocked on Foursquare after linking your Fitbit and Foursquare accounts.