Do old backlinks still help with new URL with 301 redirect? Also I added the www. How does this affect it all?

[Rmarkjr81]

I changed my URL from exampledetailing. com to exampleautodetailing. com. It is redirected with a 301. Also, it is on Squarespace AND I opted to add the www. So will the old backlinks of exampledetailing. com still help the new URL exampleautodetailing. com or do I need to try and update all the links? Also, future links, do I need to include the www. or just the root domain of exampleautodetailing. com or even the whole https://wwwexampleautodetailing. com? I believe the www is considered a sub domain and a new entity on Google, so I am not sure how that works. Thank you!

[Rmarkjr81]

So about updating links to the new one. I see that you said that I should use the https://www.domain.com at all times.

Then you said that the www is considered a new entity, but then you mention that it was ok to not use the www in my domain.

Are you talking about the backlinking domains I do from here or on the actual website itself?

Last thing.  is the backlinking rule that it should always match the exact way it shows in the URL bar? So for example https://www.domain.com should always be https://www.domain.com and never https://domain.com or even domain.com?

[RossKernez]

Hi there,

You still will get value from your backlinks if you do a 301 redirect on the server level. When doing 301 redirect you are losing about 30% of SEO juice, so it is better to update your links to the new site. For the new links, you should link them to https://www.domain.com at all times. Yes, you are correct www ( CNAME) subdomain is considered as a new entity, that's why it is ok not to use www in your domain.

Ross