Billboard

A billboard is a static world object, utilized for advertising.

Background
Affixed to buildings or installed on the side of roadways. Select billboards are featured in loading screens.

Fallout 3
Collection of billboards in the Capital Wasteland.

Fallout: New Vegas
Collection of billboards in the Mojave Wasteland.

Fallout 4
Collection of billboards in the Commonwealth.

Fallout 76
Collection of billboards in Appalachia.