>>4172313An avatar is a repetitive image or set of images that a user persistently attaches to their posts in an effort to uniquely identify themselves. Typically avatar users will have a folder full of images of a particular animated character with different poses and facial expressions, and they will choose images from this folder as a way of emoting their posts. In effect, they are attempting to post as if they were speaking as the character. If you are persistently attaching unrelated images of a particular character to your posts in an effort to uniquely identify yourself and roleplay as a character, then you are avataring.
This immediately lowers the level of discourse, and derails the thread to be about the avatar user instead of about the topic of discussion. This form of attention-whoring is not welcome on 4chan. If you absolutely must be uniquely identified, you can make use of the name field.