Why is artificial insemination considered best method for improving the cattle breed ?

Artificial insemination is the best method of improving the cattle breed  because of following reasons :

1. Several cows (about 300) can be inseminated by the semen of a single bull of good variety.

2.It overcomes the problems of  the transportation of animals.

3. Semen can be stored at freezing temperature for long period for use in the future.

4. It gives a high rate of successful fertilization.

5. It allows desirable matings and helps overcome the problems of normal mating.