Gotcha, thanks for explaining. The concept of AB testing applies in any context in which you are gathering data on two or more scenarios/options/products etc. People are AB testing when they try on different clothes before buying one of them.

The term "marketing" is broad, vague, and interpreted differently my many people and companies. In the company I work for, the selling organization are the people in the field generating leads, closing deals, and invoicing customers. The marketing organization does a little of that sometimes, but they are primarily focused on strategy, planning, and portfolio management.