Uniform Resource Locator' The term URL INTRO is a combination of two acronyms. The first acronym, HTTP, stands for 'Uniform Resource Locator'. It is a protocol used to transfer data between a web server and a web browser. This protocol is used to access websites, send emails, and download files. The second acronym, INTRO, stands for 'INTRODUCTION'. It is used to provide an overview of a website or other online resource. Together, the two acronyms form the term URL INTRO, which is used to describe the INTRODUCTION page of a website.