If you have an HTML site, most likely it uses a really small amount of system resources because it is static, but this is not so with dynamic database-driven sites that use PHP scripts and provide a lot more features. Such Internet sites create load on the hosting server anytime somebody browses them, since the web server needs time to execute the script, to access the database and then to provide the content 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 produced every single time a thread is opened or an end user looks for a given phrase. If many people connect to the forum concurrently, or if every search involves checking hundreds of thousands of database entries, this may produce high load and affect the efficiency of the website. In this regard, CPU and MySQL load statistics can provide data about the site’s overall performance, as you can compare the numbers with your traffic statistics to decide if the site needs to be optimized or transferred to another type of web hosting platform that'll be able to bear the high system load in case the website is very popular.