The most important thing they said about the work, in their own words. Two sentences at most.
Who Client is
One paragraph naming who they are, what they do, and who they serve. Specific is better than abstract.
What we built together
The opening line of the project description. What was the starting state, what did they want to change.
First deliverableOne line.
Second deliverableOne line.
Third deliverableOne line.
What came out the other side
The outcome. Concrete. With numbers if you have them, with before-and-after if you do not.
A second paragraph naming the human change as well as the business one.
In their own words
A second longer quote, paragraph form. From the client's own email or testimonial. Use their voice, not yours.