Go to https://docs.google.com/presentation and open the presentation you want to add page numbers to.

Click the Insert tab at the top of the page.

Click the Page Number button in the Header & Footer section.

Select the page number style you want to use from the drop-down menu.

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If you are creating a presentation for a professional or academic setting, it is important to include page numbers in order to make it easier for your audience to follow along. Page numbers also help to keep your presentation organized and make it easier to refer back to specific slides. Additionally, page numbers can help you to keep track of the progress of your presentation and make sure that you are not missing any important slides.

Want to make guides like this in seconds? Yes, it's really that fast.