If you don't know the forms of an art, you can not say you practice that art.
For instance, if you say you do "karate" and you don't know any Karate Forms, you DON'T know karate.
It determines the art you are studying.
Many kids here say "I want to make my Tiger Style stronger!"
Ths means they are just throwing random "Tiger Claw like" swings in the air and never stepped into a school to actually learn Tiger Boxing.
You cannot have a "tiger style" without learning it from a teacher who learned from his teacher, etc.
There are specific reasons why it is called a "Tiger" or "Dragon" Boxing.
BTW, "boxing" in Chinese Arts is the word "Chuan/Quan".
The forms teach you specific techniques characteristic of the Tiger, or the Crane, or Monkey.
For instance, in Monkey Boxing, if you notice, the practitioner is always moving his head to look. That's because Monkeys look in this manner. The Tiger's mouth is determined by the span of the hand. His claws include four fingers and the thumb squeezing to lock the prey where they grab.
Crane exposes talons resembles a Tiger Claw but the difference is in the thumbs. Your hands act as Talons of a bird.
Then there's the actual application of the technique.
Many things appear similar but the results are characteristic of the Animal/Intention.
These characteristics have been configured to be applicable against the arms, hands, body of an attacker.
Proper training is what helps you to be able to apply it without conscious thought... like a habit or just a reflex reaction.