When you see traffic from a domain like this look at referring URL(s). Go to the referring URLs themsleves to see what links exist to your site there. This should then give you an idea as to what content is of interest to these new referrers.Good luck

This is likely just a SPAMware type of site.How to Delete Pixel.mathtag.com Pop Up from PC: 5 Steps https://better.fyi/trackers/mathtag.com/ Likely your web sites got caught up in a spammers list. Try and look at your referring URLs to make sure the links are indeed not deliberately being sent from ...