I don't think that domain age is an important factor for seo. Any site can easily rank in search engines on the basis of thier optimization cause ranking is not depend on a singal factor.
Ok, what about this then.
Google became a domain name registrar but don't actually sell domain names, they may have done it to get access to all the other domain name registrars APIs.
Isn't it possible that they did it partly or wholely because they wanted info on domain name ages so that it could be a factor in their algo?
Possibly, but who apart from Google can say how they use that information?
As far as a page being the best fit for a searcher's query, age has no bearing. As far as determining whether a page is spam, maybe if that page is on a 10 year old domain then it is less likely to be spam. I would guess that if age us used, it is more likely to be used in conjunction with other multiple factors like:
If (age < x) and (very little content) and (dubious linking history) then don't trust
I just made those factors up for illustration purposes, I'm not saying they are involved in any measure of "trust".
I don't think you can say for certain that "pages on old domains rank better".
So, a website that's 10 years old with all other things being equal, has no advantage over a site that is new?
Google don't factor into it's quality score some kind of reward to the older site for being much less likely to be spam because of it's longevity?
Is that something completely different from domain age?
Age of domain is definitely important as longas the domain has been up online since it was purchased. It is but 1 factor in the algorythm which determines rankings. New sites can definitely rise up the rankings if you link to the site initially from some well ranking sites and update it everyday with unique content and articles it will rank well.
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Age is definetely a ranking factor.
The older your site is, the more SE think/assume your site is not a spam site built to make easy money from affiliates or PPC...
SE also might assume your site is a real business, as it has been for so long online...
SE might also assume that old sites are visited more often, and therefore get more worth backlinks through time.
Old sites might also be crawled more often as old could mean bigger in content, and SE want new content as often as possible.
Older pages not necessarily have a high PR, and still rank better that sites with higher PR simply...I have seen this happen for many different keywords I use with my competition...
It's all reasonable what people are saying here, but can we see supporting documentation on this? If such a thing exists.
I have read that Google prevents new sites (6 months or less) from immediately getting very high rankings. But after that, I'm not so sure if age has any effect at all. If it does, I think it's only minimal.
Not being a reputed SEO expert, I'm certain that John and others will flame me for posting this, but my actual experience has shown that it is easier to get higher SERPs with older sites than very new sites, which seem to need many more backlinks to get similar results.
I have NO idea how the algo works and won't pretend to even guess, but an old site that has stagnated, once given new and quality content DOES get ranked. Again, this is my own experience only and I have built up both new and old sites with poor, good and great quality content. Without the quality, it doesn't really matter, but given equal quality of content and quantity of inlnks, I still find that an older domain will rank higher.
Call me stupid. Call me crazy. I'm just telling you what I have experienced with my own sites.
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