The phrase "to get the message across" means to effectively communicate or make sure that someone understands what you are trying to say or convey. Full definition
Like never before, we have multiple channels to help get the message across about our products, services, culture and values. (inc.com)
Well, it's a matter of choice anyway, of getting the message across by getting people to subscribe to your language, or to subscribe to theirs. (nakedpastor.com)