As there seems to be some interest in the kicking aspect of rugby, I'll try to explain,
A team who are awarded a penalty, may choose to kick the ball out of play. It doesn't matter whether the ball bounces, or goes directly out of play. Because it's a penalty, the kicking team do not lose possession and throw the ball in at the lineout. This tactic is generally used to gain territory and keep possession. Also, a penalty may be kicked over the "H" and scores 3 points.
A defensive kick is usually to clear the ball from the try line when the team are under pressure. If the ball is kicked from within the 22 metre line, then the ball is allowed to go directly out of play. The opposition then have the lineout from where the ball went out. If the ball is kicked ahead of the 22 metre line, then it must bounce before it goes out of play, if it doesn't, then the opposition have a lineout from where the ball was kicked (not good for the defenders). However, if kicked well, although the opposition have possession, they are in their own half and are no immediate danger. This tactic loses possession, but can put the opposition in a zone where they can't score.
An attacking kick is not generally kicked into touch (out of play), it is kicked into an open space behind the front row of the opposition. This means that the defenders need to turn around and run, but the attackers are already running to intercept the ball. This tactic can be used to surprise the defenders or to break a well organised defence, and can put the attackers in a scoring position.
"Yma O Hyd!"