For some pattern wallpapers, the strips must be placed on the wall in a very specific way so that the pattern matches (repeats) over the entire surface.
To do this, be sure to follow the wallpaper symbols printed on the product sheet included with each roll of wallpaper. The standardized pictograms can indicate, for example, that each strip must be placed on the wall offset by a certain amount or that it is a random match or free match wallpaper, where you can place the strips on the wall according to the room height as you cut them from the roll.
The most difficult to process are wallpapers with a drop or half drop match. Find out more about this in "What do the wallpaper symbols mean?