What is the biological significance of cross-pollination and double fertilization for an individual and a species?

Cross-pollination and double fertilization are very important in the life of flowering plants. Many species reproduce in this way. With self-pollination, we can say that the plant reproduces itself, since the embryo in the seed has the same DNA as the parent organism. Changes and mutations are rare. But with cross-pollination, the genetic information of the two organisms is mixed. This is important, as the new organism will be able to obtain new unique DNA.