It can be used in a variety of contexts, such as:
* Modern times: "Estamos viviendo en tiempos modernos" (We are living in modern times).
* Modern style: "Esa casa tiene un estilo moderno" (That house has a modern style).
* Modern technology: "El teléfono inteligente es una pieza de tecnología moderna" (The smartphone is a piece of modern technology).
It can also be used as an adjective to describe something that is new, up-to-date, or contemporary.
For example:
* Un coche moderno (A modern car)
* Un artista moderno (A modern artist)
* Una película moderna (A modern movie)