This question tests your motivation. Bad answers sound desperate or unfocused.
Weak answers: "I wanted more money" (not compelling), "I hated my old job" (negative), "Tech is the future" (generic).
Strong answer structure:
What sparked your interest (specific moment)
What you did about it (learning, projects)
Why it fits you (connects to strengths)
Example: "I automated spreadsheets for my sales team and loved building tools. I learned Python, completed a bootcamp, and my business background helps me build things users need."
Specificity beats generality. Name the moment you got hooked.