To whom and how you need to explain your (new) marketing activities/projects usually is the first indication of how your marketing is being run. The most brilliant ideas might not matter if it takes 10 meetings to get the approvals for them.
Instead of waiting around, I think you should start small. Turn action into results, and use those results build up your reputation. Keep in mind that it takes time, and it doesn’t mean that people will stop doubting you or questioning your ideas. It simply gives you a little bit more bargaining power in your next meetings which hopefully leads to a quicker decision with less explaining.
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