Reports from PageSpeed and YSlow tell me that the content is not gziped and/or did not expire, what should I do?

WP Rocket automatically adds optimal timeout rules for static files and compresses them using gzip. If they are not applied, it is possible that there is a plugin conflict (exemple: WP Retina 2x). Try temporarily disabling all plugins except WP Rocket and retest.

If this is not conclusive, it means that mod_expire and/or mod_deflate are not enabled on your server.

Note: To enable GZIP compression on your server, you can read our documentation:
http://docs.wp-rocket.me/article/63-enable-gzip-compression