A Gigabyte is a unit of measurement relating to computer storage.  With respect to Easynews, a Gigabyte is the total amount of data you can download.  20GB (twenty gigabytes) of data transfer per month is approximately equivalent to:

• 4 complete DVDR DVD quality movies (4GB per DVD)
• 28 DVD quality DivX movies (700MB per movie)
• 5000 MP3s (4MB per MP3)
• more moderate sized pictures than you could possible print off in a lifetime

On a DSL/Cable broadband connection, 1 GB will transfer in approximately 30-45 minutes.