Each time a visitor opens your website, the browser sends a request to the web server, which executes it and supplies the desired data as a response. A basic HTML site uses negligible resources because it is static, but database-driven platforms are more requiring and use a lot more processing time. Every page that's served creates 2 kinds of load - CPU load, which depends on the time the hosting server spends executing a specific script; and MySQL load, which depends on the total number of database queries produced by the script while the end user browses the Internet site. Higher load shall be created if a considerable amount of people browse a certain website simultaneously or if many database calls are made at the same time. Two examples are a discussion board with tens of thousands of users or an online store in which a client enters a term in a search box and tens of thousands of items are searched. Having detailed stats about the load your site generates will enable you to improve the content or see if it's the perfect time to switch to a more powerful sort of hosting service, if the Internet site is simply getting very popular.