Google said this URL will only be used to link to official Google properties, explaining it is reserved “just for Google websites.” Google explained that “you can trust that it will always take you to a Google product or service.”
Back in December 2009, Google launched a URL shortening service at goo.gl for public use. Google said that non-Google properties can be linked to using the goog.gl URL shortener but g.co is only for Google use.
TechCrunch says that single letter .co domains normall run over $1.5 million.
- URL Shorteners Come To Google & Facebook
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