A site can be called "Twitter" for more than a decade and then suddenly have its name changed to "X," e-commerce platforms can have entirely made-up names like "Grailed" and "Depop," and an ...

This as-told-to essay is based on a transcribed conversation with Danielle Mass, a 25-year-old founder from London, about starting a Depop shop. It has been edited for length and clarity.