What is guest blogging?

Guest blogging is the practice of contributing a post to another person’s blog in order to build relationships, exposure, authority, and links. Links are a primary ranking factor in Google, and in SEO guest blogging offers a strong opportunity to secure a link back from another website, in addition to the other marketing considerations. 
Guest blogging establishes a relationship with the blogger hosting your post, taps into their audience for additional exposure, and helps you establish authority among an audience. Guest blogging remains a powerful online marketing tactic it is probably one of the best methods to build powerful links.