If you use a script-driven platform for your site, it stores its data in a database and the bigger the site gets, the more info it stores. As an example, if you launch an e-store, the size of the database which the e-commerce script employs will increase as you add more goods. The same is valid for a forum script - the more users that register and the more opinions they submit, the more substantial the database. If your Internet sites become more popular or you just want to add more content, this might be a problem in the event that your website hosting account has limited database space for storage. What the particular effect of reaching the limit will be depends on the script - the Internet site can function properly, but you may not be able to add any new information; the site can be shown with errors; or, in the most severe scenario, your whole site may simply go offline.