An avatar is an image that represents a person in the community. A person's avatar is displayed with their contributions in lists of content. Avatars are one way for people to make their participation in the community more personal. You can configure avatars in the admin console.
Admin Console: People > Settings > Avatar Setting
The application includes several avatar images. By default, administrators and moderators can choose from among these, but you can enable the choice for registered users as well. When registered users can choose avatars, they'll be able to choose from the avatars pictured in the admin console. If the community is configured to support it, they can also upload their own images to use as avatars (as described below).
With avatars enabled, users will get a "Change photo & avatar" link in the Actions list of their profile page. Depending on how you've set up the feature, users will be able to select from an existing set of avatar images or upload their own.
As an administrator, you can also delete or upload default avatar images for people to select from.
You might find that people get more out of the application by being able to upload their own avatar images. Enable user-uploaded avatars as one of the ways to let people personalize their experience in the community. With this feature enabled, people can upload as many images as you allow in order to have a set of images they can choose from when they want to make a change.
You can have every user-uploaded avatar image added to a moderation queue for approval. When you choose to have avatars moderated, a person uploading an avatar will be told by the UI that their avatar choice is pending approval. The avatar moderation queue will be available to a system administrator through a link on the Avatar Settings admin console page (the link is only displayed when there are images in the queue).
Moderating avatars is simply a matter of approving or rejecting avatar images that are listed in the moderation queue.
You can set the maximum height or width that uploaded avatars should be (in pixels, by default 128 by 128). Enable auto resizing of uploaded avatars to make it easier for people to upload the images they want to use.