Hi seshww and welcome to WebmasterWorld [webmasterworld.com]

I'm guessing that you are seeing these various domain names in your logs or some statistics for your site? If that is the case you are probably seeing "referer spam", scripted bots that appear to be 'referred' from some other site. Two reasons for this kind of activity are hopes that you will visit the other site to check it out (or maybe even link to them), and more often it is some paid campaign to boost the terms you observe to make them appear more popular than they probably are in their own right.

If you could explain where you are seeing all these ".best" domains then you could get a more definitive answer.

Thanks not2easy for the quick reply. I am seeing these *.best domains on my M5 Analyzer's hyperlink tree view.

[edited by: not2easy at 8:36 pm (utc) on Feb 23, 2020]
[edit reason] Please see ToS [webmasterworld.com] [/edit]