Goals scored by goalkeepers are a rare event in football, keepers will spend the majority of a match in the penalty area, a marked area around the goal that they are defending in which they can get a handle on the ball, in order to defend their goal. It is not recommended for a goalkeeper to move far beyond his area as this leaves the defense vulnerable to long-distance attempts by the oppositions, until the goalkeeper can return to defend it.
The most prolific goalkeepers are the ones that can take penalties or free kicks. In some occasions goalkeepers have even scored set pieces in order to prevent a defeat, or from goal kicks or otherwise regular clearances which travel the length of the pitch into the opposite goal.
But those are just a couple of small examples, just wait until you see these Best Goalkeeper Goals In Football History: