Google’s Matt Cutts says if you’re using guest blogging as a way to gain links in 2014, you should probably stop. Why? Because over time it’s become a more and more spammy practice, and if you’re doing a lot of guest blogging then you’re hanging out with really bad company.
He shared an spam email he received from a “content marketer” offering a guest blog post in trade for “a dofollow link or two in the article body,” which Matt Cutts calls a “clear violation of Google’s quality guidelines.”
Cutts not recommend accepting a guest blog post unless you are willing to vouch for someone personally or know them well. He wouldn’t recommend relying on guest posting, guest blogging sites, or guest blogging SEO as a linkbuilding strategy.