If you have an HTML website, it likely uses a very small amount of resources simply because it is static, but this is not the situation with dynamic database-driven sites that use PHP scripts and offer considerably more capabilities. This kind of websites create load on the website hosting server each and every time anyone browses them, due to the fact that the hosting server requires time to execute the script, to access the database and then to deliver the data requested by the visitor's browser. A popular discussion board, for example, stores all usernames and posts in a database, so some load is generated each time a thread is opened or an end user searches for a particular name. If a lot of people connect to 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 Internet site. In this regard, CPU and MySQL load stats can present you with 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 migrated to a new kind of website hosting platform that'll be able to bear the high system load in the event that the site is extremely popular.