This guide will let you know how to find the Posters & Billboards in Mondstadt to complete the quest in Genshin Impact.
There are four locations to find these posters and billboards in Mondstadt. The first three locations are on the roof of certain buildings, and the other one is located on the wall, as shown in the image below.
To find the first one, you will need to head to the building on the left side of the map. When you get there, you have to go on the top of the roof, and you will find your first poster there.
To find the next one, you will need to head to the right side of the map, and you will find the building right above the Alchemist guy in the monster city. You will find your next poster on the top of that building, as shown in the image below.
The third location to find the poster is on the middle side of the map; go there and find a building behind the windmill. You will find your next poster on the roof of that building, and you have to collect it.
The billboard is on the wall located on the north side of the map. When you get there, you will need to climb the wall and find your last billboard; you have to collect it, as shown in the image below.
