Meaning of the word "say cheese" in English

What does "say cheese" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

say cheese

US /seɪ tʃiːz/
UK /seɪ tʃiːz/

Phrase

used to tell people to smile when their photograph is being taken

Example:
Everyone look at the camera and say cheese!
The photographer told the children to say cheese for a happy picture.