This phrase often implies the person didn't have time to prepare and feels uncomfortable. During the interview, I was put on the spot with a challenging question.
Pro Tip 2/3
Emotional Discomfort
Being 'put on the spot' can create a feeling of stress or embarrassment. I was put on the spot when I couldn't remember the capital of France.
Pro Tip 3/3
Decision-making
The phrase often involves making a difficult choice quickly. Our boss put us on the spot to choose between two projects.