By default your sites static elements are already compressed with gzip, which is great, but google has developed a compression algorithm called brotli. Brotli is even more efficient and will compress your elements, eg. js and css up to 30% more than which is a lot to gain for just changing compression algorithm. And the good thing is that most modern browsers already support it.
Here is how to enable it on Powerhosting's webhotel and Magentohotel, and dedicated servers.
Add the following at the top of your .htaccess file in your DocumentRoot:
SetEnv no-gzip 1 It's that simple. Gzip will be disabled, and then brotli will take over compression.