SSO-A (Smallsat Express-A) is a mission commissioned by Spaceflight, which organizes cluster launches of small satellites. 64 satellites from 17 countries are sent into orbit. I invite you to watch the broadcast start on the link . SpaceX plans to return the first stage launched for the third time. And casing head fairing.
For Falcon 9 and American missiles in general, this is a record (the absolute record so far is for the Indian PSLV, which produced 104 satellites at a time). On top of that, this is the first time Spaceflight bought out the entire rocket for launching small satellites. Prior to that, they flew “companion” to the main load of launches.