Supply lines are a vital part of Fallout 4, allowing you to share resources between settlements and create a more efficient and prosperous Commonwealth. To set up a supply line, you first need to build a provisioner’s post in each settlement that you want to connect. Once you have built the provisioner’s posts, you need to assign a settler to each post. The settler will then travel between the two settlements, carrying resources back and forth.
Supply lines are important because they allow you to share resources between settlements, even if they are far apart. This can be very helpful for settlements that are struggling to produce certain resources, or for settlements that are under attack. Supply lines can also help to create a more efficient Commonwealth, as they can reduce the need for you to travel back and forth between settlements to trade goods.