If you have an HTML site, it likely uses a small amount of system resources because it's static, but this isn't the situation with dynamic database-driven sites that use PHP scripts and provide way more functions. This sort of Internet sites create load on the website hosting server each time someone browses them, as the web server requires time to execute the script, to access the database and then to supply the content requested by the visitor's web browser. A famous discussion board, for instance, stores all usernames and posts within a database, so some load is generated any time a thread is opened or an end user looks for a specific word. If many people access the forum all at once, or if each and every search involves checking hundreds of thousands of database entries, this may produce high load and affect the overall performance of the Internet site. In this regard, CPU and MySQL load statistics can provide information about the site’s functionality, as you can compare the numbers with your traffic statistics and see if the website has to be optimized or transferred to a new sort of website hosting platform that will be able to bear the high system load in case the website is extremely popular.