A webmaster complained on Twitter that a post that he published on Medium.com outranked the original post on his own blog. Google’s John Mueller said that this can happen:
If you post the same content in two places, we have to show one of them above the other – we can't show them side-by-side.
— ? John ? (@JohnMu) October 7, 2020
In this case, Google seems to think that Medium.com is a more reputable website than the original website. The ‘Link Influence Score’ in SEOprofiler’s Link Profiler helps you to judge the reputation of a website:
