If you have an HTML site, most likely it uses a very small amount of system resources as it's static, but this isn't the situation with dynamic database-driven sites that use PHP scripts and provide you with far more capabilities. Such websites produce load on the web hosting server anytime somebody browses them, as the server requires time to execute the script, to access the database and then to deliver the content requested by the visitor's Internet browser. A well known discussion board, for example, stores all usernames and posts within a database, so some load is generated each time a thread is opened or a user searches for a certain phrase. If a lot of people connect to the forum concurrently, or if each and every search involves checking hundreds of thousands of database entries, this could generate high load and affect the overall performance of the Internet site. In this regard, CPU and MySQL load data can present you with information about the site’s performance, as you can compare the numbers with your traffic statistics to determine if the Internet site needs to be optimized or moved to another type of website hosting platform that'll be able to bear the high system load in case the website is really popular.