To hear other voice memos from other members of the group. Memories with voice memos will have a play button on the image. If there is none there, why don't you see How do I add a voice memo to someone's memory? to find out how to add a voice memo? In the news feed section of the group, click the View Full Memory button underneath the memory Click on the Listen to voice memos option on the right-hand side: If the picture has only one memo, it will play the memo directly. If there are multiple memos present, it will open in a small box to let you listen to the one you want.