Whenever a visitor opens your site, the Internet browser sends a request to the server, which in turn executes it and gives the necessary content as a response. A standard HTML Internet site uses very little resources because it is static, but database-driven platforms are more demanding and use far more processing time. Every single webpage which is served creates two forms of load - CPU load, that depends on the amount of time the hosting server spends executing a particular script; and MySQL load, which depends on the total number of database queries produced by the script while the end user browses the site. Bigger load shall be produced if a considerable amount of people browse a given website at the same time or if numerous database calls are made at the same time. Two examples are a discussion board with tens of thousands of users or an online store where a customer enters a term in a search box and a large number of items are searched. Having detailed data about the load that your site generates will allow you to optimize the content or see if it is time for you to switch to a more powerful type of website hosting service, if the Internet site is simply getting really popular.