Gavin teaches a common expert convention for how to deal with the opponents takeout double. Without the use of this convention, you are forced to choose whether new suits at the 2 level are forcing or not forcing. Transfers give responder the flexibility to show suits with both weak hands and strong hands.
Over the past 10 years transfers have found their way into more and more auctions. This is a great introduction to how transfers can improve auctions that you wouldn’t expect. After going through this advanced convention we also discuss other auctions we can use these exact same agreements.