Web proxies are proxy servers that limit their job to the World Wide Web. Sometimes web proxies are used to intercede websites that are provocative or offensive. They also serve another, perhaps more important, function of blocking viruses that may be present on the webpages that are being read. In fact, a number of organizations make use of proxy servers to perform these very functions. A company could even intercede its employees from viewing a particular website by making use of a proxy server. Notably, the user is usually unaware that the work is being done by the proxy server.