Make Good On Meaning

(transitive, idiomatic) To fulfill or honour (a promise etc).

Example: 2013 April 9, Andrei Lankov, “Stay Cool. Call North Korea’s Bluff.”[1], New York Times:
  By now South Koreans understand Pyongyang’s logic and know North Korea is highly unlikely to make good on its gothic threats.
2012 May 19, Paul Fletcher, “Blackpool 1-2 West Ham”[2], BBC Sport:
  The result ensured that manager Sam Allardyce made good on his promise to take the Hammers back into the top flight after his team narrowly missed out on automatic promotion at the end of the regular season.