What opportunities does the use of genetic and cell engineering methods open up to breeding?

Cell and genetic engineering is widely used for plant breeding. So with the help of these methods it is possible to increase the yield or the resistance of plants to adverse conditions, which is one of the most important goals in agriculture. Such technologies can help fight hunger in the world.
Also, cellular and genetic engineering provide tremendous opportunities in experimental biology and in the creation of new forms of organisms that would be useful to humans.
These types of engineering are widely used for the selection of useful protein producers and, of course, for medical purposes.