Jul 26, 2018 - 04:18 PM
Write your answer in your cover letter. For example, "I can ensure that you have a mobile optimized website," tells the company how you can help them improve. Then you can write a few sentences about companies you are currently serving and the kind of work you have done for them. If you have any mutual acquaintances for whom you have worked, it doesn't hurt to mention names. It gives your free-lance work a little more validity.
It's also good to study examples of free-lance cover letters for more ideas. Notice in this example that the jobseeker mentions a few hard and soft skills that can catch the hiring manager's eye. Focus on the skills the employer needs to emphasize that you are the solution to their problem.