If you have an HTML Internet site, it likely uses a small amount of system resources as it's static, but this isn't so with dynamic database-driven Internet sites that use PHP scripts and offer you far more features. This type of sites generate load on the hosting server anytime someone browses them, since the server requires time to execute the script, to access the database and then to deliver the content requested by the visitor's web browser. A well-known discussion board, for instance, stores all usernames and posts inside a database, so some load is created every time a thread is opened or an end user looks for a certain phrase. If lots of people access the forum concurrently, or if every single search involves checking tens of thousands of database entries, this may produce high load and affect the efficiency of the website. In this regard, CPU and MySQL load data can present you with data about the site’s efficiency, as you can compare the numbers with your traffic data to determine if the site has to be optimized or moved to a different kind of hosting platform that'll be able to bear the high system load in case the website is really popular.