That's what my result looks like!
Does anyone know how to fix Leverage browser caching and Specify a cache validator?
I've googled it but didn't find anything. I have Apache.
From the Google Page Speed Documentation:
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
The Apache Caching Guide should explain how to configure Apache accordingly.