What is the point of brown sugar in a Thai Red Curry recipe?

Made some Red Curry last night, and the recipe instructs me to add 1-2 tbs brown sugar according to taste. Since I'm not educated in the finer points of cooking, can someone explain to me what's going on with the recipe? It also tells me to vary the amt of paste as well as fish sauce, but I can't get a good grasp of how the 3 variables work together.What is the point of brown sugar in a Thai Red Curry recipe?
The main in Thai food



is...



The hot and spice from the chillies

The sweetness and colour .. from the sugar,

The salt taste and the smell from the fish sauce



The uniques in the recepies is..



1.if the Curry to hot or to salty the brown sugar might balance it.



2. if the Curry have to much of sugar the fish sauce will balance it.



3. So in Thai cooking the brown sugar and the fish sauce is important as well a salt and pepper in other cooking .What is the point of brown sugar in a Thai Red Curry recipe?
It is for sweetness.

It is a question of balance

Sweetness

Bitterness

Saltiness etc

Fish sauce adds the saltiness.What is the point of brown sugar in a Thai Red Curry recipe?
Thai food always has a touch of sweetness and it is important to capture the authentic flavor.