https://blog.activision.com/call-of-duty/2019-10/Feature-All-the-Intel-You-Need-on-Special-Ops
"Within Modern Warfare's Special Ops are multiple dynamic experiences that take place on a wide variety of maps. The largest and most involved multi-stage experiences unfold across a sprawling urban environment around the city of Verdansk. These 4 player matchmade activities are known as Operations.
Most of the Killstreaks you know from Multiplayer Mode, such as airstrikes and UAVs, will be accessible in Special Ops. In addition, a number of vehicles, including tanks, helicopters, and ATVs, give your squad the opportunity to tackle any Operation at hand in a variety of ways."
At launch, you will embark on four multi-stage Operations with more scheduled to come throughout the post launch seasons. All post launch Operations will be coming to all platforms simultaneously.
Missions: Complementing the multi-stage Operations, and also available across all platforms, are additional Missions, which can be played solo or with up to four players. Whereas Operations give you the widest breadth of strategic and tactical choice, Missions are a more curated experience where your proficiency with specific weapons, killstreaks, and other tools will be tested. These Missions are extremely replayable, and you're able to achieve a 1, 2, or 3-star ranking based on your performance. Naturally, there will be an "Infinity Ward time" that you can attempt to beat!"