Because ADSL broadband service leverages the existing telephone network, the technical infrastructure for ADSL service is relatively inexpensive.  In addition, because nearly 100% of homes in the developed world already have a land line telephone service and most people live in urban areas nearby telephone exchanges, ADSL service is widely available.

ADSL broadband allows files to be downloaded from the Internet very rapidly.  This works well for most Internet uses such as web surfing, live text chat, email, streaming media and for other popular applications.

Unlike dial-up Internet connectivity, ADSL is "always on" and therefore readily available.  Unlike dial-up, ADSL does not does not monopolize the phone line. 

Two or more computers can be connected to a single ADSL broadband connection. This allows multiple users to concurrently access the Internet without noticeable degradation in response.