Started in 2004, DeviantArt is one of the most popular web art galleries. It serves a lot of users every day. One fact: it's mostly a general art site, not like FurAffinity.
This tag should only be used if DeviantArt imagery such as their logo or their mascot Fella appear, not for whenever the site is merely mentioned such through an artist's DeviantArt URL watermark (i.e. <username>.deviantart.com).