Marcus the Worm is the character behind this short greeting, and the clip is best known online as a simple hello to Robert rather than as part of a longer scene. It has spread mainly through short-form edits, reaction videos and chat shares, where its brevity makes it easy to drop into a cut without disrupting the pacing. Its staying power comes from that specificity: a named greeting feels personal and funny in a way a generic hello does not, so creators keep reusing it whenever a Robert, or a stand-in for one, shows up.