Meaning of the word "it's a small world" in English

What does "it's a small world" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

it's a small world

US /ɪts ə smɔl wɜrld/
UK /ɪts ə smɔl wɜrld/
"it's a small world" picture

Idiom

used to express surprise when one meets someone unexpectedly or discovers a surprising connection with someone

Example:
I can't believe you know my cousin! It's a small world, isn't it?
We met on vacation, and then again at a local coffee shop. It's a small world!