Backend

In the computer world, the "backend" refers to any part of a website or software program that users do not see. It contrasts with the frontend, which refers to a program's or website's user interface. In programming terminology, the backend is the "data access layer," while the frontend is the "presentation layer."

Most modern websites are dynamic, meaning webpage content is generated on-the-fly. A dynamic page contains one or more scripts that run on the web server each time the page is accessed. These scripts generate the content of the page, which is sent to the user's web browser. Everything that happens before the page is displayed in a web browser is part of the backend.