The canvas puts an entire business model on a single view. Each block is a question. Together they force a team to state, in one place, who the customer is, what they value, how the offer reaches them, and how the model makes money. Gaps and contradictions become visible fast.
It works because it is shared and fast. A team can sketch a model, challenge it, and iterate in an afternoon, rather than burying the logic in a long document nobody reads together.