If you have an HTML site, in all probability it uses a very small amount of resources simply because it's static, but this is not so with dynamic database-driven sites that use PHP scripts and provide a lot more functions. Such websites produce load on the web hosting server each and every time somebody browses them, since the web server requires time to execute the script, to access the database and then to deliver the info requested by the visitor's browser. A widely used discussion board, for example, stores all usernames and posts in a database, so some load is generated any time a thread is opened or a user searches for a certain name. If lots of people connect to the forum all at once, or if each and every search involves checking thousands of database entries, this could produce high load and affect the functionality of the Internet site. In this regard, CPU and MySQL load statistics can provide information about the site’s overall performance, as you can compare the numbers with your traffic stats to decide if the website should be optimized or transferred to another kind of website hosting platform that will be able to bear the high system load in case the Internet site is popular.