What Does Signature Mean

Hi, everyone! I'm new to this forum so I am a little lost. I was working on decorating my avatar and profile when I saw the "signature" tab. What does having a signature do and what does it mean? Thank you!

Quote from chainyviolet

It's the space below your text in your post. You can either put text, gifs, images, vids, etc. And whenever you post, they will appear under your text.

My signature for example, is these two gifs of Onew and other stuff.

Thanks! I really like your signature.

Quote from ghostings

See the gifs under my post? That's a signature

Thanks! I think I was just looking at one of your posts as I got your notification lol