socialbookmarking with .org how important they are? socialbookmarking site with .org are better or sites with .com are better? .org can be consider as quality sites? preference has to given to .org or .com?
Domain extension is irrelevant unless you're talking about a .edu or .gov .com is the most popular, and so it's the first one people type in. That's why they do better in SERPs, there's just more of them.