There are two sections of badges on your profile.
Basic information badges
These are short bits of information about you. You only see the badges on another user’s profile that you have completed, so the more you add, the more you see!
My Interests badges
Here you can add up to 15 badges to tell people more about what you do and enjoy, such as your hobbies, church involvement, family, music and favourite foods. You will need to add a minimum of 5 badges to complete your profile.
When viewing another user’s profile, any matching badges will be highlighted in Red to show where you have a mutual interest or the same basic information.