Does google track who owns or runs websites? If you own several sites does google have a need for that information and how do they use it? For example, if you own two websites, similar topics but different content. You link site A to site B. So site B has a backlink form site A. Does google give the same value to this backlink compared to a backlink (everything else equal) from a website that is not owned by the same person / company? I would asume google would have an interest in this type of info. Does anyone know more?
IMO it doesn't matter who owns the site/links, it's about the quality and relevancy of the links that matters to Google as well as the other SE
True. If you have good relevant, quality copy on your site, you should rank well. Even if you own another, "spammy" site.
take blogger as an example. if you have an account on blogger, you can make more than 1 blog in 1 account. It does not matter whether those blogs belongs to 1 account, all that they care about is your blog itself...
There was once a myth that Google penalizes sites from same C class ip address. This is something you will get if you host two sites on same web hosting. But this was denied by Google and that is the official standpoint now. So answer to your question is no penalization regarding ownership or ip address.
Since Google and others SEs try to avoid rewarding those that "game" the system - having two similar sites on the same server linking to each other would diminish the quality of the links, however hosting your individual sites on different C-Classes IPs would remove that barrier. However here is another twist that maybe someone can help me with - what if you have say 5 similar blog sites on 5 different C-Class Ips, but you use the same Adsense account to place ads on all 5 sites - would Google use that inside knowledge to know that these sites are in fact a "blog farm" and re-apply that penalty?
hey feediver - I must have missed this c-class denial from Google! I will need to check into that more! I love DP because I can learn stuff that disproves what I thought I knew. Here is what I found: "Actually, Google handles virtually hosted domains and their links just the same as domains on unique IP addresses. If your ISP does virtual hosting correctly, you'll never see a difference between the two cases. We do see a small percentage of ISPs every month that misconfigure their virtual hosting, which might account for this persistent misperception--thanks for giving me the chance to dispel a myth!" -Google Director of Technology Craig Silverstein (Slashdot interview)
Do not interlink your own sites that are related to the same content. http://www.google.com/support/webmasters/bin/answer.py?answer=66356