Note that many websites have their own advertising, unrelated to adware.
CommonName is yet another 'keywords' service, allowing you to type a company name instead of a URL. Originally a normal service, the software has become bundled adware.
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The newer variant CommonName/Agent periodically opens pop-under advertising as well as highjacking search settings. Cookies are used to identify you when requests are made to CommonName, allowing them to track your web usage. Requests are made when advertising is opened and when you visit a web address with a top-level-domain that the CommonName software does not know about. This includes .edu and .mil.
This adware is also bundling with Rootkit.win32.WinIk