can someone tell me what ding is??

[mrFDNY]

hi all,
i keep seeing post with posters saying they got dinged.i know it has something to do with airlines.but what??can you help me out with this,please??TIA

 

[idno9999]

DING! delivers live updates with exclusive low fares from Southwest Airlines
go to SWA site to download

 

[cranbiz]

DING is a program that communicates with Southwest and delivers daily specials to your computer. Download it from Southwest.com. It sits active in your system tray and DING's when a special is released. It will have an envelope on the "tail" when a DING is present.