I give teams and students the same small test, and it rarely goes the way they expect. Tell me what you do in one plain sentence. No wind-up, no mission statement, no list of services. One sentence a stranger would understand on the first pass.
Most people can't, at least not the first time. The sentence comes out as three, or it fills with words that sound like meaning without carrying any. "We help ambitious brands unlock growth through integrated solutions." That isn't a sentence about a company. It's a sentence about wanting to sound like one.
I'm sympathetic, because the difficulty is real and it usually isn't about writing. When the sentence won't come, the decision underneath it hasn't been made. Who is this for. What does it replace. What are we willing not to do. A fuzzy sentence is a fuzzy strategy wearing a good coat.
The resistance is always the same, and it's reasonable on its face. But we do so much more than that. Yes. You probably do. The point of the sentence isn't to describe everything you're capable of. It's to give a person the one true handle they can pick you up by. The rest of what you do can be discovered later, once someone has a reason to look.
This is why I think of the exercise as diagnostic before it's creative. If four people on the same team write four different sentences, you haven't found a wording problem. You've found that the team doesn't yet agree on what the company is. Better to learn that in a workshop than in a year of marketing that quietly pulls in four directions.
There's a discipline in it that doesn't come naturally, which is leaving things out. A good sentence is mostly a record of what you were brave enough to drop. The founder's favorite feature, the second audience you'd like to have, the adjective everyone in the category already uses. What survives the cut is usually the thing that was actually true.
I don't think the single sentence is the whole of strategy. It won't capture nuance, and it shouldn't try. But it's a cheap, honest test of whether the thinking has been done, and it travels. Once a team can say the sentence and mean it, the website gets easier, the sales calls get shorter, and the brief stops needing a paragraph to explain itself.
So that's the test. Say what you do in one sentence a stranger would understand. If it comes out clean, you've done the harder work already. If it doesn't, that's not a failure. That's the work, showing you where it still is.