Global advertising revenue is forecast to break a record in 2021 as the world says good riddance to a depressing 2020. That’s one takeaway from Ad Age Marketing Fact Pack 2021, our annual guide to marketers, media and agencies. The Fact Pack, published as a digital edition, is free for the next 60 days. (Happy New Year from Ad Age.)Ad Age subscribers: Go to the Member Content section of your account profile to download the Fact Pack.Non-subscribers: Download the Fact Pack at AdAge.com/resources.