This is a description of what cheetah bot does just so you know.
If cheetah detects that an article may not be original content, it creates a comment that lets readers know that the article is likely elsewhere on the internet already. This comment is meant to be understood by the author that they should try and avoid copy pasting <----------------. It also informs readers of the article that there is a chance the author is not the original one, and have either copy-pasted or plagiarized.

Even if the submitter is the author, there is nothing wrong with the comment, it simply informs the reader that it is not unique (exclusive) content on Steemit. Voters can choose how to use this information..