According to Chapter 21, you do not need to announce the end of your presentation. Listeners can tell when you are ending.

Question

Quizplus · Accepted Answer

Announcing the end of your presentation is important because it signals to your audience that you are summarizing your points and gives them a clear indication that the presentation is concluding, ensuring they are attentive for any final important information or call to action.

According to Chapter 21, You Do Not Need to Announce