You can add Slide Numbers and Date and Time to your PowerPoint presentation to make it more impressive, and this post shows how to do that.

Use the Slide Master view in Microsoft PowerPoint to customize the look and feel of your slides and create a consistent view for your presentation. You may wish to create multiple master slides ...

Slides are like pages, and you can add, duplicate, and delete them. Learn how to add, duplicate, and delete slides in Google Slides.

Manually adding a message to each slide of a complex presentation is time consuming, so it's easier to use the Slide Master.