When the companies are looking for the freelancers, they usually judge the candidates on the basis of the experience that candidate has written in his/her resume. It can be hard for the candidates who are just starting their career as freelancers as they have no experience and people hiring the freelancers will usually select the applicants having proof that they are good at what they do. By knowing how to market and sell yourself to the clients will offer you a discrete advantage as compared to other freelancers who wait for consumers to come to them.