The Green Bay Packers head into the 2021 offseason roughly $20 million over the projected salary cap. The Packers have several starters and key players who are scheduled to be unrestricted free agents and they may want to try to keep some of them.
One way to do this is to use the franchise tag or transition tag on these players. That means that they will return to the Packers in 2021 on a one-year deal at a specific salary that is determined by the average of the top salaried players at that specific position.
Keeping a player for another year could also buy the Packers some time.