The Gallery stores all of your saved maps, and gives you the option to export them into other formats. You just click on an image to select it.
Export as PPT
Select the slides you want in your presentation, and click 'Export selected as PPT'. Your presentation downloads straight after.
Export as Gif
Select the slides you want and click export as GIF, then you can click and drag to reorder the slides and set the delay between the slide transitions.