When you use a database-driven script application for your site, all of the content that you or the site users add, will be stored in cells and tables inside a database, not as plain text in the application files. In contrast, HTML websites are static and all of the content on such a site is part of the actual HTML files. An online store app, for instance, takes all items, prices, user reviews, and many others, from its database and this is valid for any kind of script that enables you to make a dynamic site. The more the information you include, the larger the database becomes, so in case you employ a script-driven site, you have to make sure that your website hosting package comes with adequate database storage space. The aforementioned applies regardless of what type of databases you are using - for example MySQL or PostgreSQL.