Stylesheets decide how soon the first picture of your page appears. Find this on Optimize, then CSS.
Make style files smaller (minify CSS)
Removes spaces and comments from stylesheets and inline styles. Your original files are never changed.
Don’t change these styles
One per line: a file name, a style handle, or part of an inline style. Use this when one stylesheet looks different after minify.
The self check runs after each change and switches back if your page got worse.