How to tag
From the Danbooru Wiki:
"Tag what you see. In other words, only tag the visual and factual elements in the image. For example, images where the full moon is prominently depicted will have a full_moon tag. Ideally you should use an existing tag ...
"Do not use subjective tags (such as sexy, cute, hot, etc). These tags are problematic because they are based on personal opinion, and different opinions can conflict."
If looking for keywords to tag an image, consult the Danbooru Wiki: http://www.donmai.us/wiki_pages/5650
Also consult their page on how to tag, which contains more techincal details: http://www.donmai.us/wiki_pages/11292
"Tag what you see. In other words, only tag the visual and factual elements in the image. For example, images where the full moon is prominently depicted will have a full_moon tag. Ideally you should use an existing tag ...
"Do not use subjective tags (such as sexy, cute, hot, etc). These tags are problematic because they are based on personal opinion, and different opinions can conflict."
If looking for keywords to tag an image, consult the Danbooru Wiki: http://www.donmai.us/wiki_pages/5650
Also consult their page on how to tag, which contains more techincal details: http://www.donmai.us/wiki_pages/11292