Through the [gamipress_badgr_login] shortcode (block and widget too) you can place a Badgr login form anywhere where your users can sync their Badgr account with your website account to sync the achievements they unlock on your site.
There is how this form looks:
When an user syncs his Badgr account, every time they earn an achievement synced with Badgr the earning will appear on his Badgr account too. There is an example of a badge earned from the website:
Important: Only accounts from the same region as you setup on the add-on settings can be synced.