The phrase comes from Staples, the office-supply retailer, whose Easy Button advertising campaign in the mid-2000s turned a red button and the line that was easy into a cultural shorthand for effortless work. The button itself became a popular desk novelty, and the short spoken line travelled from television commercials into internet videos, streams, and soundboards. It endures because it is instantly understood, fits almost any small success, and delivers its joke in less than a second.