Something that significantly alters the situation or outcome; an innovation or event that fundamentally shifts the competitive landscape.
Originally from sports terminology, particularly baseball and football, where a single play could dramatically alter the game's outcome. The phrase moved into business and technology contexts in the 1990s and 2000s, coinciding with rapid technological innovation and disruption in various industries.
Game changer' has become so overused in marketing and business that it's lost much of its impact - everything from new apps to minor product updates gets labeled as 'game-changing.' True game changers are rare, like the internet, smartphones, or the printing press, which fundamentally altered how entire industries operate.
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