The Department of State announced an update to its Cuba Restricted List, which includes entities and subentities in Cuba with which financial transactions are discouraged, as they might benefit the Cuban military or government at the expense of the Cuban people. This update, which took effect on January 8, 2021, includes one additional subentity and is part of ongoing measures outlined in a 2017 policy directive to strengthen U.S. policy towards Cuba. More information about the updated list can be found on the State Department's website.
Simple Explanation
The State Department made a list of places and businesses in Cuba where U.S. people aren't supposed to spend money because it might help the Cuban government instead of the people. They added one more place to the list on January 8, 2021.