When you're creating a presentation in PowerPoint, you can add speaker notes to refer to later while delivering the slide show in front of an audience. Learn how to add speaker notes to view while presenting in PowerPoint in this video tutorial from Microsoft.
During your presentation, the speaker notes are visible on your monitor, but aren't visible to the audience. So the Notes pane is the place to store talking points that you want to mention when you give your presentation.
The Notes pane is a box that appears below each slide. An empty Notes pane will prompt you with text that says, Click to add notes. Type your speaker notes there. If you don’t see the Notes pane or it is completely minimized, click Notes on the task bar across the bottom of the PowerPoint window.
If your notes exceed the allotted length of the Notes pane, a vertical scroll bar appears on the side of the pane. You can also enlarge the Notes pane by pointing your mouse at the top line of the pane and then dragging upward after the pointer turns into a double-headed arrow.
Learn more: https://support.microsoft.com/en-us/office/add-speaker-notes-to-your-slides-26985155-35f5-45ba-812b-e1bd3c48928e