The CPU load is dependent upon the length of time a hosting server spends executing a script any time a visitor opens a page on a certain script-driven Internet site. Static HTML sites use hardly any CPU time, but this isn't the situation with the considerably more sophisticated and functional scripts, that use a database and display dynamic content. The more people open such a site, the more load shall be generated on the web server and if the database is very large, the MySQL server will be loaded also. An illustration of what can cause high load is an Internet store with thousands of products. If it's popular, lots of people shall be visiting it all at once and if they search for items, the entire database which contains all the products shall 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 site is doing, if it needs to be optimized or if you simply just need a more efficient website hosting solution - if the website is very popular and the current setup can't cope with the load.