Why human use money?

Without money the world would be very complicated.
Imagine you are on a flea market and you want to have some cucumber from Xavier.

I mean really good big delicious cucumbers!

You offer him some sausages but he`s a vegan, so he
says "no no never ever hermano!". So the only other way to get the juicy cucumbers is to get them through a third person, who wants your sausages and has to offer something that
Xavier wants. So everybody is happy =)

So the message is that money makes exchanging goods easier.
Money is only worthing a price because we think the value equals other products like food or technology. So there can´t be unlimited money on earth because it would lose on value caused by inflation.

My question is do we humans need money? How would the world work without money?
Maybe I do another blog on how a alternative human history could look like.
Here is a tip: