said 1 year, 1 month ago:
In my experince it’s the code, the page content and the links pointing to the page that affect the ranking, not the TLD.
There are hundreds of TLDs, with the potential for thousands more now that companies (and well-heeled individuals) can pony up $185,000 and get their own custom “generic TLD.” It’s true that country-specific TLDs may get some sort of boost in the search results from that country (which only makes sense), but .com is a “global” TLD that isn’t associated with any specific country.
I’ve heard a lot of unsubstantiated claims, a lot of FUD, but I have seen no credible evidence that a .com extension gets any preference in the global search results over sites created on other TLDs, simply as a result of the TLD.
The main reason to avoid .co if you can get a .com instead is that many people, when typing in the address, will “overshoot the mark” and automatically add the “m” to the end… and potentially end up on someone else’s site. This is one of the problems that lead Overstock.com to pull back from their rebranding as “o.co”, for instance.
If you design intuitive information architecture, write good content and seek out strong links, you’ll do fine no matter what your TLD.