A skill is a demonstrated ability to do something well. Skills can be learned and developed in a variety of ways through: Schooling, Training, Self study,
Hobbiesand On the job activities

The more you develop your skills, the more profitable you will be. Many people have trouble identifying their skills and; when they are capable of doing so, feel uncomfortable expressing them. Having an understanding of your skills will allow you to follow your desired occupation(s) that you are qualified for and that you will enjoy.