Avatar is a term used to refer to the small picture under your name.
How to change avatar settings
Step 1 - Login
Step 2 - Open your profile
Step 3 - Click "Modify Profile"
Step 4 - Scroll down to the avatar section in your profile. You can select an avatar from the list (blue circle) or enter a custom avatar (red circle). To have a custom avatar, enter a link to a picture on the internet.
Step 5 - Update your profile by hitting the modify profile button at the bottom.
INAPPROPRIATE PICTURES WILL BE CONSIDERED A RULES VIOLATION AND WILL RESULT IN A 7 DAY SUSPENSION.