If you have an HTML website, it likely uses a very small amount of resources due to the fact that it's static, but this is not the situation with dynamic database-driven websites that use PHP scripts and provide much more features. This type of Internet sites produce load on the web hosting server every time anyone browses them, due to the fact that the hosting server needs time to execute the script, to access the database and then to provide the info requested by the visitor's Internet browser. A well known discussion board, as an illustration, stores all usernames and posts in a database, so some load is generated every single time a thread is opened or a user looks for a certain name. If a lot of people connect to the forum at the same time, or if every search involves checking thousands of database entries, this can generate high load and affect the overall performance of the website. In this regard, CPU and MySQL load data can give you information about the site’s overall performance, as you can compare the numbers with your traffic statistics to decide if the website should be optimized or migrated to a different kind of web hosting platform that'll be able to bear the high system load in the event that the website is popular.