Most common ones to use:
>Copyright (Series, franchise), Character and Artist.
If you dont know any of those, add character_request, copyright_request or artist_request, someone might add it for you.
>Number of boys and girls.
1girls, 2girls, 2boys, etc.
We tag what we see, so stuff like gender identity or canon is irelevant for these tags.
If there's a single character there, tag only solo.
>Hair and Eye Color.
Extremelly simple, if you cant figure out an exact color or are indecesive between 2 colors, just tag both.
>Notable body parts show.
Breasts, Penis, Nipples, Feet, etc.
>Fetish tags
If it falls into something that some people not like, like scat, bestiality, ntr, etc. Please add those tags as kind of warning tags.
Other tags you could use:
>Light_Skin or Dark_Skin
>Nude, Naked
>Text (also English_Text and Japanese_Text)
>Censored
>Ai_Generated (if made by AI, also they usually dont get tagged artist then)