According to AP:
For the first time since 1983, when Anheuser-Busch used all of its ad time to introduce a beer called Bud Light, the beer giant isn’t advertising its iconic Budweiser brand during the Super Bowl. Instead, it’s donating the money it would have spent on the ad to coronavirus vaccination awareness efforts.
Anheuser-Busch still has four minutes of advertising during the game for its other brands including Bud Light, Bud Light Seltzer Lemonade, Michelob Ultra and Michelob Ultra Organic Seltzer. Those are some of its hottest sellers, particularly among younger viewers.
Pepsi, Coke, and Audi also made similar announcements.