Selling Point Meaning

(idiomatic, business) The property or characteristic of a good that most attracts purchasers.

Example: 1985, Mariana Valverde, Sex, power and pleasure
  So the main interest of the book (and its selling point, carefully highlighted in the blurbs) lies in the contradiction between the feminist ideals of equality and independence in relationships
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.