Many talks do not end; they fizzle. "So, yeah, that's it. Any questions?" The energy drains away, and so does much of what the audience heard.
People remember endings disproportionately. Your last minute is your best chance to make your message stick.
Three strong endings
1. Return to the beginning. If you opened with a story, return to it, now changed by everything you have said. It creates a satisfying circle.
2. A clear call to action. Tell people exactly what to do next. Not "think about this", but "tonight, write down one belief that holds you back."
3. A final line worth repeating. One short, memorable sentence that captures your message. Say it slowly. Then stop.
Then, stop
After your final line, pause. Hold eye contact. Say "thank you" simply. Do not add a second ending, or a third. Let it land.