A blog writer is a writer who creates online content for their personal website or contributes content for an online newspaper or existing blog. Bloggers can write about any topic, but some of the most popular include fashion, gardening, tech, health care, news, and real estate. Your duties depend on whether you are writing for yourself or part of a larger organization. If you blog on a personal website, you have to come up with new content and blog titles that help you develop a following. You also use social media or email marketing campaigns to build interest in your work. If you work for a larger organization, you may have more strict deadlines and other obligations. While quality content must come first, many blog writers use search engine optimization (SEO) to increase traffic to their posts.