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Hi To Leverage browser caching speeds up your site as it will only cause common resources to be loaded once rather than every time you load a page on your site or revisit the site. In order to leverage browser caching I would suggest editing your web.config file if you are on an IIS server or in the .htaccess file if you are on an Apache server. Both of these will involve you making an entry into either of these files and shouldn't require your hosting company. I regularly work with both, but in particular Apache servers and I often drop the standard code in to leverage this and speed the site up. One other noticeable speed enhancement I would recommend is gzip compression which can be carried out in a similar manner. If you have anymore questions about any of this don't hesitate to give me a shout on here