What does to start off mean?

What does mean to start off

“Start off” is a phrasal verb and is therefore fixed. “Begin off” is not an alternative. “To start off” really has no significant difference from “to start” or “to begin.”

She started off as a great singer, but her voice declined seriously due to drugs, smoking and neglect.

What does start off mean?[YSaerTTEW443543]

TOEIC listening, photographs: A man in a hardhat[YSaerTTEW443543]