What is the relationship between mutational processes and natural selection?

Mutation processes and natural selection are closely related to each other. These are one of the main driving forces behind evolution. In addition to these processes, there is also heredity. Mutations arise spontaneously and are mostly negative, but when a beneficial mutation appears, it is passed on to the offspring. Those with beneficial mutations were much more likely to survive natural selection. In the end, those who had more useful adaptations and mutations survived. Nowadays, they also occur in many organisms, but they are very difficult to notice.