Source: https://blogvut.blogspot.com/2018/01/dogadan-5-bilgi.html
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!
Hello. Thanks for an advice. I have edited my post.
Btw, I found this picture on another webpage than mentioned above as a source.
Someone reported your post because you used the #photography tag. The photography tag is for photos people took themselves, not for photos from the internet. When you use it its like saying "I took this photo". Using the #photo tag instead achieves the same result in terms of visibility.