What is an independent commercial marketing advisor, and how is it different from an agency or a consultancy?
An agency is paid to make and run marketing. A large consultancy is usually paid to run a process and then staff the delivery of it. Both have something to sell after the recommendation, which shapes the recommendation.
An independent commercial marketing advisor has nothing to sell you afterwards. The work is judgement: what the evidence actually says, which decision is in front of you, and what a board will accept as a defensible answer. Where delivery is needed after that, it's a separate decision you make on the merits.
"What the evidence says" is not a figure of speech. Much of the durable research on how brands actually grow comes out of the Ehrenberg-Bass Institute for Marketing Science, and good advisory work should be arguing with that body of evidence rather than ignoring it.
