The CPU load is dependent upon the amount of time a server spends executing a script every time a visitor opens a webpage on a certain script-driven website. Static HTML websites use barely any CPU time, but it's not so with the much more sophisticated and functional scripts, which use a database and display dynamic content. The more people open this type of a website, the more load will be produced on the web server and if the database is large, the MySQL server will be loaded too. An example of what may cause high load is a web-based store with thousands of products. If it is popular, a lot of people shall be visiting it all at once and if they search for items, the whole database which contains all of the products will also be continuously accessed by the script, which will result in high load. In this light, having CPU and MySQL load statistics will provide you with an idea of how the website is doing, if it has to be optimized or if you just need a more efficient hosting solution - if the Internet site is extremely popular and the current setup can't cope with the load.