Subdomains and domains are treated as two different properties by search engines. Both should have separate robots.txt files etc. As @ms mentioned, if the content on bot...

Yes, it can harm SEO not only SEO but the overall performance of your website on Google. As your website has already existed with different extensions Google can get easi...

Sorry for the Confusing Question and thanks for replying. So I have a website pacificmetalindia.com and there is one more website pacificmetal.co.in now because of that m...

You should hire an SEO expert who can locate the problem to reach the solution. Meanwhile, you can try by updating the content of pages for better quality. It will certai...

Should not be an issue at all if the content of those pages is different.

I don't understand your question. xyza.com and xyzb.com are not the same.

Spy your competitors. Choose for quality and relevance not for quantity.

A natural mix of both you need.

https://www.bildungsserver.de/schulen-in-deutschland-276-de.html

Ok, so I just have to wait for Google to remove them, do you know how long that could take?