
The Google PageSpeed recommendation to serve static assets with an efficient cache policy is all about browser caching. It’s usually pretty straightforward to fix on WordPress sites.
“Static assets” means the files on your site: CSS, JavaScript, images, fonts, videos (and other media files).
“Efficient cache policy” means that they have a long enough browser caching value so that they do not have to be downloaded by your site visitors frequently. Usually 4 months or longer is enough to satisfy Google and other tools.





