Update 09/07: Search Engine Land have reported that Google's John Mueller has twice stated that if you are guest blogging for links, then those links should be nofollowed. This is stronger proof than ever that Google considers guest post links a violation of their Webmaster Guidelines and it's a matter of time until we see some sort of 'guest post link penalty'. I think this should be taken with a pinch of salt so you shouldn't rush out and nofollow all your posts, but you should definitely think about the kinds of sites you are writing for and the quality of your content.
Nearly two years since we wrote about guest blogging as the next big thing for SEO and link building, it's time to look at how guest posting has changed, the impact of scaling and whether it's still a valuable SEO technique.
It's important to remember that content marketing is not just guest blogging. Find out exactly what it is on our Content Marketing Course or read our Content Marketing Guide.
Craig Charley
8 Jul 2013