Please help explain the word "margin"

[SarahChau]

From dictionary.Cambridge, margin means that the profit made on a product or service. It gave us the below example.
E.g.Using cheap labour increases profit margin.

If “margin” already means profit, why the about sentence still use “profit” beforemargin?

[Torsten]

The term “profit margin” usually refers to the return on an investment, often expressed as a percentage.

..... that end, we will all work harder to increase our profit margins this year

..... that end, we will all work harder to increase our profit margins this year. (*) At (*) For (*) By (*) To This is a companion discussion topic for the original entry at https://english.best/questions/18456,___-that-end-we-will-all-work-harder-to-increase-our-profit-margins-this-year/

[NearlyNapping]

The word profit is used because there are different types of margins. They all refer to profit, but they are calculated slightly differently.

For example profit margin is different than gross profit margin. Profit percentage is different than either one. There is also what I call an absolute margin, but to my knowledge that is not an actual accounting term.

The term profit is tricky. It can mean a lot of different things.