What are the benefits of guest blogging ?
The most obvious benefit of guest blogging is that it connects you with audiences that aren't already your own particularly if you're doing it right. What I mean by that is that you're seeking to guest blog on blogs that have greater traffic than your own. You're blogging on more well established and known blogs that are in your niche.
When you find blogs like this and you get accepted to be able to guest blog on these sites, your content is likely to get a boost that is not possible on your own blog.
Blogging.. in many ways is a numbers game. The more people that you can connect with improves your reach and visibility. If no one knows you, getting established is impossible.
Whether you agree or not, a huge priority in guest blogging is getting found and getting your name out there as you're trying to establish yourself and your credibility. Leveraging other well known blogs is a good way to do that.