An armrest is like a little pillow for your arm that sits on chairs or couches. It's usually a flat piece that sticks out from the side of the chair, and it's designed to be a comfortable place for your arm to rest while you sit.
When you're sitting in a chair or on a couch, you might get tired of holding your arms up or resting them on your lap. That's where an armrest comes in handy! You can just lean your arm on the armrest and relax.
Different chairs and couches have different types of armrests. Some are smooth and padded, while others are more firm and have a harder surface. Some even have little cup holders built in! The type of armrest you have depends on the chair or couch you're sitting on.
Overall, armrests are just a simple way to make sitting more comfortable by giving your arms a place to rest.