The CPU load depends on the length of time a web server spends executing a script each time a visitor opens a page on a certain script-driven Internet site. Static HTML websites use hardly any CPU time, but this isn't the case with the considerably more complex and functional scripts, which use a database and display dynamic content. The more customers open this type of a website, the more load will be generated on the hosting server and if the database is very large, the MySQL server shall be loaded as well. An example of what could cause high load is an Internet store with tens of thousands of products. If it is popular, plenty of people will be browsing it concurrently and if they look for items, the whole database containing all the products will also be constantly accessed by the script, which will result in high load. In this light, having CPU and MySQL load statistics will offer you an idea of how the Internet site is doing, if it needs to be optimized or if you just need a more efficient hosting solution - if the site is popular and the established setup can't cope with the load.