Is there a corelation between a website IP-adress and the value of a backlink?
Lets say your IP-adress = 123.123.123 (Example IP adresses)
And you have a backlink from 123.123.124, Or even the same 123.123.123 does is have less value than a backlink from 199.999.999?
Is there kind of a relation between those IP-adresses and their value?
I honestly don't know if there's any value to backlinks now, or if Google has just gotten so smart that I can't figure out the value.
Back when I did web design for clients, I always put "web design by blah blah" at the bottom with a link to my site. In the early 2010s that helped a lot, but by 2015 it seemed to have no value. Putting them on different servers had no impact, either.
And then I tried creating a unique page on their site (with their permission, of course) that had a brief paragraph about their website, and linked to my main site twice within the paragraph that fit in with the context (in a non-spammy way). Something like: This website began in 2005, and was redesigned by <a href='https://www.example.com'>Example</a> in 2009. The new build focused on blah blah and yadda yada. More blah blah blah.
<a href='https://www.example.com/webdesign/'>Example</a> used blah blah and more blah blah when they designed the site...
This didn't seem to have any impact on my SE, either. So after that, I just gave up on trying.
If you own a 2 websites with the same content, how far do you need to change the IP-adress so Google DOENST see it as duplicate?
123.123.124 or does it have to be a complete different IP-adress? And if yes, how much needs to change?
Like the others said, the IP makes no difference at all here. Think of it like this: Google has no idea if the second site is just stealing content from the first, and they definitely don't want to reward a thief! So they try to give all of the value to the original site.
The best thing I can suggest is to use <link rel="canonical" href="https://www.originalsite.com/originalpage/">
on the second site so that Google can find the source easier. The original site will still get the value, but at least the second site won't get punished.