I got a bunch of domains of the form mywebsite.com, mywebsite.biz, mywebsite.org. As of now, 1 of them is javascript redirect, and the other 5 are parked.Will javascript redirecting all of them to my main website (otherurl.com), help or hurt my SEO?
What does redirecting my duplicate domains do to SEO?
seo
Will javascript redirecting all of them to my main website (otherurl.com), help or hurt my SEO?Client-side javascript redirects and the similar meta-refreshes are strongly associated with deceptive practices by Google. There are still some narrow circumstances where Google are ok with you using them but they strongly recommend that you use server-side HTTP response status code 301 Moved Permanently redirects instead. There is much debate amongst SEO industry experts about the exact impact of them but they are generally considered high-risk for low if any reward.If your non-main domains have no content yet then they are irrelevant as regards SEO as they have no content to crawl and index. Google only cares about good quality content, nothing else.If you simply want to have multiple domains all pointing to the same content then the 301 redirect discussed below is the Google-approved way to do that.Assuming you want a permanent redirect as opposed to a temporary one...The only kind of redirect that will not harm your SEO is a HTTP response status code 301 Moved Permanently.HTTP response status code 301 is a HTTP server response code and can only be sent from a server. There are multiple ways of doing this (including server-side javascript).HTTP response status code 301 cannot be achieved by running javascript in the HTTP client (aka the web browser)