Step1: Select the slide that you want to add the animated GIF to.
Step2: On Home tab of the ribbon, under Insert, click Picture > Picture from File.
Step3: Navigate to the location of the animated GIF you want to add, make sure the file name ends with a .gif extension, select the file, and then click Insert.
Step4: To play the animation, select the Slide Show menu and then select Play from Current Slide.