The CPU load depends upon the amount of time a server spends executing a script every time a visitor opens a page on a specific script-driven website. Static HTML sites use hardly any CPU time, but this is not the case with the much more sophisticated and functional scripts, which use a database and display dynamic content. The more individuals open this type of a website, the more load will be generated on the hosting server and if the database is big, the MySQL server will be loaded too. A good example of what can cause high load is a web-based store with tens of thousands of products. If it is popular, plenty of people shall be browsing it concurrently 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 stats 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 powerful website hosting solution - if the site is extremely popular and the existing setup can't handle the load.