I'm a freelance would likely refer to a freelance writer who is available to work on writing projects without being tied to a specific employer or company. These writers are typically self-employed and work on a project-by-project basis, rather than being a full-time employee. They may write for a variety of different clients and industries, and may specialize in a specific type of writing such as copywriting, content creation, or technical writing. They may also work on a variety of different projects such as blog posts, articles, web content, marketing materials, and more.