What you are seeing is called Referrer Spam. It’s not real traffic and it can throw off the accuracy of your Google Analytics data if you do not set up a Referral Spam filter.
Most Google Analytics referral spam is created by ghost visits and can be prevented
with a single “Valid Hostname” filter.
Here is a blog post that explains what it is and how to prevent it: https://megalytic.com/blog/how-to-fi…analytics-spam