Matt Cutts from Google blogged in January about guest blogging and how it has turned into a more spammy practice recently and that if you do it a lot, “You are hanging out with really bad company”. Below is the tweet that Matt sent out

 


 

My interpretation is that guest blogging is still ok if done appropriately. If you are doing it more than just occasionally, there will probably be some adjustments to Google’s algorithm that could negatively affect you.

If you have an opportunity to write a valuable article for a guest post that will appear on a blog in your niche and it has relevant content, I would not hesitate to take the opportunity. I would however definitely try to diversify your link building efforts and definitely stay away from blogs that do a lot of guest posting or large blog networks such as this.