My main query for SERP search suddenly dropped to the 4th Google page from the 1st page. I looked at my webmaster tools (backlinks), checked all backlinks and found 2 mimic domains that link to my domain. So, all that I did is submitted disavow file with these domains. I also found a whole network of spam pages that link to me.
How to guard our websites against these kinds of mimic domains and toxic backlinks from these websites?
I assume that it is the work of my competitors, but that fact is not helpful to me.