GZip compression when enabled makes your website to download faster as the browser does the work of de-compressing it and therefore you save on bandwidth as well as make surfing on your website faster. Text2HTML ratio of your website should be in the vicinity of 12% and above in favor of text on your website. Using the above stats you can make your website download faster as well as know if you have a bloated layout which minimizes the relevance of your content.