Avoid communicating randomly and hoping for the best. A communication strategy defines your objectives, identifies your target audience, chooses the right channels, and is built around impactful messages. Without it, you're flying blind and burning through your budget for little return.
In concrete terms, it allows you to remain consistent (same tone everywhere, same energy), measure your results (you finally know what works), optimize your budget (no more useless actions), and get your teams on the same page.
In short, it's the difference between posting because you have to and communicating because it's beneficial. Between activism and effectiveness.