The top list of domain names provided by alexa gives ranking to the websites. This is useful for many reasons. The reports can be done by global traffic, country or categorically. You can also search on this site to find your webpage and find out where it ranks according to others like yours.
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There are many places to find a list of domain names for sale. Many of these places are brokerages that will sell on behalf of individuals and tack on a fee. None the less, these are great places to get domain names which already have a decent traffic rating. You can buy one of these and have your site coming up in search engines from day o