What is a one sentence elevator pitch?

It's called elevator pitch, an explanation that takes less time to say than climbing a floor in an elevator. You may not have a business to explain, but I bet you have a mission. It's from when I was working in a place where forklifts have become an art: the world of feature film development. The other week I was at a startup workshop and heard one of the best one-sentence arguments I've found.

However, perfecting the tone of a sentence can be a complicated exercise without the right guidance or “formula”.