Grover is one of the longest-running Muppet characters on Sesame Street, the blue monster recognized for his eager, high-pitched voice and physical comedy. This short clip catches him being tickled, dissolving into helpless laughter that is unmistakably his. Because the character is familiar across generations, the giggle lands without any context, which is why it keeps getting reused online. Creators reach for it as a wholesome reaction sound, a softer alternative to exaggerated meme laughs when a video needs genuine, childlike joy.