If you have an HTML site, it probably uses a very small amount of resources because it is static, but that isn't so with dynamic database-driven sites that use PHP scripts and offer a lot more features. This type of sites create load on the website hosting server anytime somebody browses them, because the hosting server needs time to execute the script, to access the database and then to deliver the information requested by the visitor's browser. A well-known discussion board, for instance, stores all usernames and posts within a database, so some load is produced every time a thread is opened or an end user searches for a specific term. If many people access the forum at the same time, or if every search involves checking a large number of database entries, this may produce high load and affect the overall performance of the website. In this regard, CPU and MySQL load statistics can present you with data about the site’s performance, as you can compare the numbers with your traffic statistics to determine if the site has to be optimized or transferred to another type of web hosting platform that will be able to bear the high system load if the site is extremely popular.