The phrase put your mask on spread online as a short shareable reaction clip, often titled in Morse code on soundboards which helped it stand out in search results. Short voice reminders like this became popular during years when masks were a daily topic in schools, shops and public transport. Creators kept reusing the line because it works as both a literal reminder and a joke, and its brief length makes it easy to download, share and drop into memes, edits and group chats.