Impactful vs. Influential — What's the Difference?

Having a significant or powerful effect.

Having or exercising influence.

Having impact.

One that is of considerable importance or influence

Having or exerting influence.

A person who has influence

Exerting or possessing influence or power; potent; efficacious; effective; strong; having authority or ascendency; as, an influential man, station, argument, etc.

Having or exercising influence or power;