The CPU load depends on the length of time a hosting server spends executing a script whenever a visitor opens a webpage on a given script-driven Internet site. Static HTML websites use hardly any CPU time, but it's not the situation with the far more complex and functional scripts, that use a database and display dynamic content. The more people open such an Internet site, the more load will be created on the server and if the database is large, the MySQL server will be loaded too. An illustration of what could cause high load is an Internet store with a huge number of products. If it's popular, many people shall be browsing it simultaneously and if they search for items, the entire database containing all of the products shall also be continuously accessed by the script, which will result in high load. In this light, having CPU and MySQL load data can provide an idea of how the Internet site is doing, if it has to be optimized or if you simply just need a more potent hosting solution - if the Internet site is popular and the established setup cannot handle the load.