Skinner advocates a behaviorist point of view, which he terms as experimental analysis of behavior. For Skinner what are important are the responses and the role of reinforcement in shaping the responses.
It is not only that we learn many behaviors through operant conditioning; we can also eliminate or modify unacceptable behaviors using operant procedure. Most of the maladaptive behaviors are learned with the assistance of reinforcement, either visible or invisible.
Classical conditioning is one of the two main forms of simple learning. The other is instrumental conditioning, which is also known as operant conditioning. When a dog responds (e.g., sitting) to the commands of its master to get some biscuits (reinforcement), the dog has learnt an instrumental response.