selling point

noun1

1. •
   The property or characteristic of a good that most attracts purchasers.

   • March 25 1982, LA Times, One Last Time Around Ocean Boulevard Route When the Long Beach Grand Prix was started in 1975 the major selling point was that Formula One cars would race down Ocean Blvd...
   • May 16 2003, CBS News, Renee Zellweger's '60s Flashback - The Early Show But for Zellweger, the major selling point was the script. "It was such a great read," says the actress.