StahnAileron said:
Red means the tag represents an artist. This being the artist who made the image, or whose created image is used as a source. It does NOT mean the artist from the original source material...usually.
Wrong, on the Danbooru site the Artist tag is red, but here its yellow, red tags are things about the image ie: zoom_layer, logo, Scifi's favorite jpeg_artifacts.

BTW whats [sic]