Wights are a product of White Walkers, and they're essentially undead pawns that the White Walkers use to fight their battles. As we learn in season seven, if you kill a certain White Walker, you also kill the wights it created — which is why Jon is so hellbent on going after the Night King.

Are the White Walkers good or bad?

In order to defend themselves, the Children created the first White Walker as a weapon against the First Men. ... First off I'd like to say that no, the White Walkers are not good. They're just not. They are evil zombies bent on destroying all of Westeros during the Long Night, and that is their purpose.

What is the difference between a Wight and an other?

Legends that circulate in Westeros, however, speak of a race that seems to have been the Others and was a major adversary of humankind thousands of years ago. The Others are closely associated with, but different from, wights — reanimated corpses of people or animals killed by Others.