The nudge feature is a useful feature to use when you are close to getting a winning combination and if you are close to a jackpot then it might come even more in hand.
The nudge feature is especially popular in the fruit machines, and you will find them in this game categories at many online casinos.
A nudge feature is triggered automatically and the slot machine you are playing in will show how many nudges you have been rewarded with. Depending on the number of nudges you have been rewarded with, which is a random number, you will be able to move more reels up or down. Under each reel there is a button which you can click on, which will make the reel move one position down or one position up at a time, giving you the chance of getting a winning combination or perhaps activate a bonus round in the game.
An example of a game that offers the nudge feature is Pub Fruity, developed by Microgaming.