Google Chrome is able to estimate that a page will have too long a loading time (2G network or display start time greater than 5 seconds) taking into account the current network and the capabilities of the phone model in order to put set up a series of optimizations (combination of optimizations integrated in Google Chrome and use of Google servers) considerably reducing the loading time of the page requested by the Internet user.
Only static content (content and images) will be impacted by these performance optimizations. Sensitive data such as cookies and connection information are not impacted and shared with Google.
Note also that the lites pages have no relation to the AMP pages :
- Chrome reads pages are standardized optimizations applied to a page on your site by Google.
- AMP pages are a series of specific and structural optimizations to be implemented on your site in order to be able to offer an optimal browsing experience to your Internet users.
This functionality can be used by checking the “data saver” function on the Android version of the Google Chrome browser and requires a secure HTTPS page.
However, Google leaves the possibility to developers to block the use of this functionality (in order not to hinder the use of advertising elements) via the use of the “no-transform” directive in the cache-control header.