If you have an HTML site, most likely it uses a very small amount of system resources as it is static, but that isn't the case with dynamic database-driven websites that use PHP scripts and offer you way more functions. Such sites produce load on the web hosting server anytime someone browses them, because the hosting server requires time to execute the script, to access the database and then to provide the data requested by the visitor's Internet browser. A widely used discussion board, as an illustration, stores all usernames and posts inside a database, so some load is generated each time a thread is opened or a user looks for a certain phrase. If lots of people connect to the forum all at once, or if every search involves checking tens of thousands of database entries, this may create high load and affect the functionality of the site. In this regard, CPU and MySQL load data can give you information about the site’s efficiency, as you can compare the numbers with your traffic data to decide if the website has to be optimized or moved to another sort of hosting platform which will be able to bear the high system load if the Internet site is extremely popular.