When a badge is awarded, learners can view their badge in the Overview (on the left menu of the course). 

To request an endorsement, from a colleague or employer for example, select Endorsements on the badge, then enter the name, email address and message to the person you want an endorsement from.

Once your badge has been endorsed you'll be notified by email. You can then review the endorsement and choose whether to make it publicly visible on your badge.