Why do Jordans say retro?

Excuse me, could you elaborate on why the term "retro" is often associated with Jordans? Is it due to their classic designs and nostalgic appeal, reminiscent of earlier decades? Or does it stem from the fact that they are often re-released in styles from the past, catering to fans who desire a touch of nostalgia in their sneaker collections? I'm curious to understand the underlying reason behind this trend and how it contributes to the popularity of Jordans.