The CPU load is dependent upon the amount of time a server spends executing a script whenever a visitor opens a webpage on a particular script-driven website. Static HTML sites use barely any CPU time, but this isn't so with the much more advanced and functional scripts, that use a database and display dynamic content. The more individuals open such a website, the more load will be created on the hosting server and if the database is large, the MySQL server will be loaded too. An illustration of what can cause high load is an Internet store with a large number of products. If it is popular, lots of people shall be browsing it all at once and if they search for items, the entire database which contains all of the products will also be continuously 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 site is doing, if it has to be optimized or if you just need a more effective web hosting solution - if the website is very popular and the established setup cannot deal with the load.