What is copywriting outsourcing? What's the difference with advertising companies?

Copywriting outsourcing is an organization or individual that writes copywriting for enterprises. The key words are copywriting and outsourcing. For example, Daxiangnan Copywriting Outsourcing Center initiated by Oda Tian specializes in copywriting outsourcing services. An advertising company is a company that specializes in advertising for enterprises. Some comprehensive advertising companies also have positions such as advertising copywriting or copywriting planning, and can also write copywriting, but some only do advertising production, advertising design or advertising activities. Most of them do design, production and activities at the same time. The biggest difference is the degree of concentration.