Google Inc. has agreed to acquire Urchin Software Corporation, a San Diego, California based Web analytics company. Urchin is a Web site analytics solution used by Web site owners and marketers to better understand their users' experiences, optimize content, and track marketing performance. Urchin tools are available as a hosted service, a software product, and through large Web hosting providers. Google plans to make these tools available to Web site owners and marketers to better enable them to increase their advertising return on investment and make their Web sites more effective. The acquisition is subject to customary closing conditions. Google anticipates that the acquisition will close before the end of April. Financial terms of the deal were not disclosed.