A personal tagline
Not every speaker has a personal slogan to go with them. However, if you have one, you should probably think about employing it at your closure.
If you have a tagline that you use frequently, you should try utilizing it at the end of your speech. This helps to reinforce your message in the short term while also building your brand in the long run.
Bergells used the example of a sales manager who ended every sales presentation with the phrase "Sell value." Russell Wilson, the quarterback of the Seattle Seahawks, always closes his interviews with "Go Hawks."
This will help to establish your brand and reinforce your message over time.