These two terms were presented by psychologist Carol Dweck refers to the people having different mindsets. People who have fixed mindset are stuck with their abilities and qualities and they only believe that it is enough whereas People who have growth mindset are able to learn with the time and experiences, they know that they can excel if they will work hard. People have fixed mindset believe that their abilities are fixed traits and cannot be changed while it is totally opposite for the people with growth mindset.
Diagrams
Originated from/Coined by
Carol Dweck
Further Reading/ References
https://www.developgoodhabits.com/fixed-mindset-vs-growth-mindset/