If you could master only one skill to support your freelance career, would it be sales, copywriting, or networking? Why?

[Btaliat]

There is no way the three skills are not needed by the freelancers that are looking for the best. However, you need to make sure that you focus more on sales. Sales have become one of the skills that needed to be learnt in order to make it accurate. You need to focus more on what drives sales to you in order to b profitable in the freelancing business. What do you have to say about this?