It may be beneficial to enhance your resume with relevant online freelance activities. Someone applying for a nutritionist position might want to include freelance activities pertinent to that subject matter. Many employers want to see completed projects, long term work histories, and a good work ethic. If including your online freelance activities gives more weight to those qualities it is beneficial. Displaying your personal accomplishments is a sign of self confidence and might sway an employer to pick you over a less confident candidate.