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 particular script-driven Internet site. Static HTML websites use hardly any CPU time, but it's not the case with the far more advanced and functional scripts, which use a database and display dynamic content. The more individuals open this kind of a site, the more load shall be produced on the hosting server and if the database is large, the MySQL server shall be loaded also. An example of what may cause high load is an online store with a huge number of products. If it's popular, lots of people shall be exploring it all at once and if they search for items, the whole database containing all the products shall also be frequently accessed by the script, resulting 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 simply need a more effective website hosting solution - if the website is very popular and the established setup cannot handle the load.