I know the basic overview of how gradient boosting trees work but i am finding it hard to figure out the use of gradient in gradient boosting. My questions may seem stupid but it would be great if anyone can help me out !. So my question is

What is exactly a gradient and how can it be used in gradient boosting ?

P.S : It would be even more helpful if someone can explain me with less math

I know the basic overview of how gradient boosting trees work but i am finding it hard to figure out the use of gradient in gradient boosting. My questions may seem stupid but it would be great if anyone can help me out !. So my question is

What exactly is the use of gradient in gradient boosting ?

P.S : It would be even more helpful if someone can explain me with less math