If you have an HTML website, in all probability it uses a small amount of system resources because it is static, but that isn't the case with dynamic database-driven websites that use PHP scripts and offer you much more functions. This kind of sites generate load on the hosting server each time anyone browses them, as the server requires time to execute the script, to access the database and then to provide the info requested by the visitor's Internet browser. A well-known discussion board, for instance, stores all usernames and posts inside a database, so some load is created every single time a thread is opened or an end user looks for a particular word. If lots of people access the forum all at once, or if each search involves checking a large number of database entries, this may generate high load and affect the functionality of the website. In this regard, CPU and MySQL load statistics can provide you with data about the site’s performance, as you can compare the numbers with your traffic stats to make a decision if the website should be optimized or moved to another type of web hosting platform that'll be able to bear the high system load if the website is extremely popular.