Source- http://sverigesradio.se/sida/avsnitt/667563?programid=412

Using irrelevant tags, especially popular tags, makes it hard to find good and relevant content.
Please try to use only relevant tags when posting!

#photography
Please refrain from using #photography for posting art, posting graphics, posting other people's photos without proper attribution or explicitly stating it's not yours.
#introduceyourself
The “introduceyourself” tag is for creating a post that tells us about you. Users are encouraged to use this tag exclusively for that, and not to reuse it.
#steemit

Please only use the “steemit” tag for articles distinctly related to Steemit, the website, itself.

Not citing the source of photos (images) is plagiarism. Here is a post on why this is bad, and here is how easy it is to find allowed photos.

Creative Commons: If you are posting content under a Creative Commons license, please attribute and link according to the specific license. If you are posting content under CC0 or Public Domain please consider noting that at the end of your post.

Not indicating that the content you copy/paste is not your original work could be seen as plagiarism.

If you are actually the original author, please do reply to let us know!