The CPU load is dependent upon the length of time a hosting server spends executing a script whenever a visitor opens a webpage on a given script-driven site. Static HTML websites use hardly any CPU time, but it is not so with the considerably more advanced and functional scripts, which use a database and display dynamic content. The more people open this kind of an Internet site, the more load shall be generated on the server and if the database is very large, the MySQL server shall be loaded as well. An illustration of what may cause high load is a web-based store with tens of thousands of products. If it's popular, lots of people shall be exploring it concurrently and if they search for items, the whole database containing all the products will also be continuously accessed by the script, resulting in high load. In this light, having CPU and MySQL load stats will offer you an idea of how the website is doing, if it has to be optimized or if you simply just need a more efficient website hosting solution - if the site is popular and the established setup can't deal with the load.