Travel bags are available with many combinations of size and features, but are distinguished by rigid and/or heavily padded construction, including the clubhead cover (which on most other bags is simply an unpadded "rain fly"), and locks on the zippers and bag cover. These features protect the clubs from abuse and theft, and generally makes the bag suitable for checked airline luggage. Travel bags are generally used by amateur players that travel occasionally, such as business executives; rigid flight cases that enclose the actual golf bag are generally preferred by touring players, as these cases can enclose any golf bag, are more discreet as to their contents thus further deterring theft, and the case's weight and bulk can be left behind while on the course where it's not needed.
Alternately, the rules allow for a mound of sand to be used for the same function, also only on the first shot. Before the invention of the wooden spike tee, this was the only accepted method of lifting the ball for the initial shot. This is rarely done in modern times, as a tee is easier to place, hit from, and recover, but some courses prohibit the use of tees either for traditional reasons, or because a swing that hits the tee will drive it into or rip it out of the ground, resulting in damage to the turf of the tee-box. Tees also create litter if discarded incorrectly when broken.
It makes it easier to shoot a low score on the golf course when you have the right clubs. They should feel good in your hand, make solid contact with the ball, and be durable enough to last for many seasons. Even if your golf technique is not the best, a quality golf club may help you get more distance and reduce your tendency to hit a slice or draw.