When you grow a company from scratch, in most cases, you don't have a massive marketing budget.
This requires a scientific method for marketing experimentation to prioritize channels with the highest potential within your marketing strategy.
To be sure, when I say "scientific method," I do not mean a framework to understand "what to do" but rather a framework to understand "what not to do" so you can set the boundaries of the best scenarios to pursue in the initial stages of your business's development.
Often, this marketing prioritization process will bring you to experiment with new marketing channels that might still be under-utilized by your competitors and, for this reason, the ones with the highest potential.
Gabriel Weinberg and Justin Mares manufactured the bullseye framework in their book Traction.
Let me give you a bit of background about the story of one of the authors, Gabriel Weinberg, and how they came up with this framework.