Guest posting is where you write a blog post that gets placed on someone else's blog, or you allow other people to write articles for placement on your blog.
When you write a guest post on someone else's blog, it gives you wider exposure and helps position you as an industry expert. You can also usually include a link to your own website in your author bio.
Having others guest post on your blog can also help position your blog as an authoritative source. Plus it generates content for you without you having to write it yourself. Of course, if you have someone else guest posting for you, you should offer them the opportunity to include a link to their
site in their author bio.