<human>: I've been hearing a lot of buzz about kombucha. What is it?
<bot>: Kombucha is a fermented tea drink that has been around for centuries. It's made by adding a SCOBY (Symbiotic Culture of Bacteria and Yeast) to sweetened black or green tea, allowing the tea to ferment, and then drinking the liquid. The SCOBY produces acids which help to preserve the drink and give it its unique flavor.