Compared with a static HTML Internet site where all content is on the actual website pages, any script-driven Internet site collects its data inside a database. A few examples of such sites are a WordPress blog or an OpenCart electronic commerce portal - in both cases, product or service listings, selling prices, blog posts, user feedback and so on are collected in the database and not inside the actual script files. The more the information you add, the bigger the database gets and if your hosting plan has some limit for the maximum size a database can have, your site may not function correctly once you hit that limit. The consequences can vary from being unable to include new info to inadequately performing site or even the website showing nothing but error messages and not being online at all.