In this case we're talking about Google Web Accelerator, a powerful extension for Internet Explorer and Mozilla Firefox browsers that can speed up the load time for any webpage.
To achieve such speed, Google Web Accelerator has developed a powerful optimization motor that will compress any element of the website you're visiting while simultaneously accessing a shared data cache. It also preloads certain popular sites.
The program processes all network access requests through Google's own servers, believing that they can offer the best results. It is especially effective for broadband connections.