Select the slides you want to include on the summary slide. You can click to select individual slides in the outline, or press Ctrl+A to select all the slides.
Click the Summary Slide button on the Outlining toolbar.
PowerPoint creates a summary slide and places it before the first selected slide. You can type a new title for the summary slide or use the default title.
A summary slide shows the titles of slides included in your presentation. You can use a summary slide at the beginning of your slide show to let your audience know what you plan to talk about or present.