The meaning of a fork is basically a disagreement in the way the coin is being run and as a result that is why it forks off. They do it because the visions aren't aligning and when you want to do something else either you struggle or make your own coin and forking is the way of not struggling.
Forks are differences on the coin programming which generate a new 'coin' using the new technology and algorithms, as an example a code implementation on an existing coin will cause a fork
Thanks guys i really understund what is the meaning and the system of forks
Thanks for sharing your opinion