Meaning of the word "think on their feet" in English

What does "think on their feet" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

think on their feet

US /θɪŋk ɑn ðɛr fit/
UK /θɪŋk ɒn ðeə fit/

Idiom

to be able to think and react quickly, especially in an unexpected situation

Example:
A good salesperson needs to be able to think on their feet.
During the debate, she had to think on her feet to answer unexpected questions.