I get the following F grade:
Grade F on Add Expires headers
There are 6 static components without a far-future expiration date.
(2016/10/13) https://cjs.ptengine.com/pta_en.js
(2016/10/14) https://cjs.ptengine.com/3a2dc781.js
(2016/10/14) https://apis.google.com/js/client:platform.js?...
(2016/10/14) https://www.google-analytics.com/analytics.js
(2016/10/14) https://connect.facebook.net/en_US/sdk.js
(no expires) https://preprod.be-novative.com/feed/
Is there a recommended way in 2016 to improve these?
One of the better ways of solving this is to download the JS file to a location that can set cache headers (for example
Cache-Control: max-age=2419200). This must be updated regularly.