Traffic Optimization for Apache and Nginx Web Servers
Webmaster Level: Advanced
Ordinary users can use a simple solution - a special proxy server, for example, for the Chrome browser. When you use it, content passes through a Google proxy server, which automatically optimizes pages and halves traffic. This useful solution has limitations: it can only be used by Chrome users who have enabled the corresponding function, and it does not process materials protected by https.
Thanks to the Optimize for Bandwidth function , webmasters can use the same technology. Everyone will benefit from this: users of other browsers and ordinary computers, developers of secure web pages, as well as website owners who want to reduce traffic costs. It is enough to install the PageSpeed module on the Apache or Nginx server  and enable the Optimize for Bandwidth function. The tool will do everything by itself.
Learn more about how to install the PageSpeed tool and activate the Optimize for Bandwidth feature .
 If you are working with another server, try running the PageSpeed tool on an Apache or Nginx proxy server. All of these resources are open source . In the near future, similar capabilities will be implemented for IIS , ATS , etc.