New from the last Heists update is the ability to launch a Heist mission with only two players. Players in the crew can vote on whether or not they are satisfied with their share of the take. This mission's payout is divided up by the crew leader - the intention is to recoupe their losses form the setup missions while also turning a tidy profit. You and your three teammates will need to be in constant communication and work together to complete all parts of these complex, multi-faceted missions.
These are the culmination of all of your preparation and setup missions.