What makes someone a good communicator? There's no mystery here, not since Aristotle identified the three critical elements — ethos, pathos, and logos. — thousands of years ago.
Ethos is essentially your credibility — that is, the reason people should believe what you're saying.
Pathos is making an emotional connection — essentially, the reason people believe that what you're saying will matter to them.
Logos is your mode for appealing to others' sense of reason, ergo the term logic. Employing strengths in strategic thinking, problem solving, and analytical skills are how today's leaders express logical ideas in clear and compelling enough terms to influence outcomes.
These three elements of communication reinforce one another. You may rely heavily on data and analysis (logos) to make a point and in so doing create a perception of expertise and authority on a topic (ethos). And while all three are necessary to excellent communication, improving your ability to do any one of them will help you become a better communicator and so a better leader. Combining them is the path to achieving the greatest success.