A strategy map is a single-page diagram that communicates an organization's overall strategy. It shows how objectives across different perspectives like financial, customer, internal processes, and learning and growth fit together and drive each other. Strategy maps help align employees by showing them how their roles contribute to strategic goals. Arrows between objectives indicate causal relationships and how achieving lower objectives leads to success in higher ones. Keeping the number of objectives below 20 ensures the strategy map remains clear and easily communicated.