"Granny Animation" is a tag in the world of adult content, which refers to animated pornographic videos featuring elderly characters or themes. In this case, "granny" signifies grandmothers or older women, and "animation" indicates that the video is not live-action but rather created using computer graphics or hand-drawn illustrations. The tag implies that the content involves sexual scenarios involving these animated grandmothers, which can cater to those with specific interests in age-play, mature characters, or simply animation style.