Programmatic
When a process is automated and self-service is the definition of programmatic.
When looking at programmatic buying, this would include: paid search, Facebook marketplace and FBX, affiliates, display RTB, online video RTB and any other biddable media / RTB buy.
Trading Desk
A team of ‘programmatic planners / buyers’ is the definition of a trading desk.
Most agencies claim they have a ‘trading desk’ yet run paid search, affiliates and Facebook marketplace in different buildings to their RTB buys, in which case they should be called a managed service DSP or ad network.
Only when an agency has all programmatic buying under one team and one ‘head of’ can they truly call themselves a trading desk and have the ability to run a trading desk as it should be done.