Not indicating that the content you copy/paste is not your original art could be seen as plagiarism.
Repeated plagiarized art posts are considered spam. Spam is discouraged by the community, and may result in action from the cheetah bot.
#art (https://steemit.com/trending/art)
Please refrain from using “art” tag for posting other people's creations without proper attribution or explicitly stating it's not yours.
If you are actually the original author, please do reply to let us know!
Thank You!
More Info: Abuse Guide - 2017.