Field of view (FOV) is a setting in Fallout 4 that determines how much of the game world is visible on the screen. A higher FOV will make the game world appear wider, while a lower FOV will make it appear narrower.
There are several benefits to increasing your FOV in Fallout 4. A wider FOV can make it easier to spot enemies and objects in the distance, and it can also help to reduce motion sickness. However, increasing your FOV can also make the game world appear more distorted, and it can make it more difficult to focus on objects in the foreground.