Meaning of the word "to put it mildly" in English

What does "to put it mildly" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

to put it mildly

US /tə pʊt ɪt ˈmaɪldli/
UK /tə pʊt ɪt ˈmaɪldli/

Idiom

used to indicate that one is using a word or phrase that is less strong than might have been used

Example:
The meeting was a disaster, to put it mildly.
Her performance was not good, to put it mildly.