What is the "give a badge" actions ?
It is like a medal, you go to someone's profile page and select Give Badge under Actions on the top right of the profile.
Clive is correct, it is a light recognition system that lets you 'reward' users for helping you in the community. You can give badges in user profiles or by using the @Mention People, Places and Content feature and selecting Give a badge when you hover over a username.
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