Google began beta testing of AMP AdWords landing pages in May. The beta testing is now over and Google will roll out the feature to all soon. In an official blogpost, Google said, “Earlier this year at Google Marketing Next, we introduced the ability to use fast-loading AMP landing pages for your search text ads. Starting in two weeks, we’ll be rolling this out to all AdWords advertisers globally.”
You may check out the help document on how to make AMP landing pages. AMP pages are faster and better.
AMP landing pages for search ads will be available for all mobile clicks but caching will be available for Chrome browser on Android, initially.