"Tuturu" became widely recognized through Steins;Gate, where Mayuri Shiina uses it as a signature greeting. The phrase spread through anime fandom, remix clips and short-form edits because it is instantly identifiable even in a one-second sample. It remains popular years later because it is simple, cute and easy to drop into memes without needing setup. Online, people use it to signal anime culture, lighten a scene or give a clip a soft, playful tone similar to Nico Nico nii.