There are many reasons why you would want to establish supply routes.
We have some more guides about problems with settlements: No income will come out of establishing supply lines. There is no such thing as a trade route in the game. Lets just get one thing out of the way first – supply lines are not trade routes. Once you go through the process it is quiet easy, but at first it may seem confusing because the interface doesn’t clearly show how to do these things. One of the questions we often get is how to start supply/trade routes between settlements and consequently how do you move settlers between your settlements in Fallout 4.
