What they do

The Buyer is on a Mission. In this world of big, complex problems, the Buyer has their job precisely to solve big, complex problems. Their job is to find the right problem to solve, choose the best solution to that problem, and sell their choice to their staff, peers and leadership.
This most always involves dealing with salespeople and Expert Sellers from potential solution providers. And what the Buyer wants from them is rarely given, let alone even understood.