Besides the above mentioned, use such a content on your webpage so that people can link your webpage. This works wonderfully.

I recommend to maintain only one website rather than multiple websites. With one SEO effort, benefits will be shared with all the pages on the website.

When a website links an another website then the linking website passes the link juice to the linked website irrespective of whether a link is declared dofollow or nofoll...

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.