Why does tequila have a worm in it, and what is the significance of this tradition?

Tequila does not traditionally have a worm in it. The worm is actually found in some bottles of mezcal, which is a different type of agave-based spirit. The worm is not a traditional or common practice in mezcal production, but it is sometimes added as a marketing gimmick. The significance of the worm is debated, with some believing it is a sign of high quality or authenticity, while others see it as a marketing ploy to attract attention.