The Grim Reaper Knocking Door meme, often referred to as 'Death Knocking on Doors,' originated as a webcomic illustrating the progression of death across different targets. The template features a hooded reaper walking down a hallway, leaving a trail of blood behind doors he has already visited, while he knocks on the next victim's door. It became a viral sensation for satirizing corporate acquisitions, the decline of social media platforms, or any series of events where entities are being 'killed off' one by one. Its versatility in depicting inevitable downfall makes it a staple for internet commentary on industry trends and pop culture shifts.