Guest posting is writing and publishing articles on other?s website or blog. It is the best way to reach the audiences that you want to speak and to connect readers and get more exposure. So for exposure, branding, increased reach Guest posting is one of the best available option to choose. For seo propose Guest posting is what gives you a relevant and quality back link and traffic this thing leads Guest posting to a next level where millions of bloggers just like you and me waiting for it desperately to welcome the most traditional and authentic way to reach people with a quality back link so the too much love for Guest posting from bloggers makes it more and more spammy practice and low quality guest posts appearing in every minute. When you and me really loves something search engines started to hate that and same thing happen to guest posting. Search engine?s decides guest posts ?for SEO purposes? might be subject to penalties and your single guest post can panelized your site the problem is that you and me don?t know that how search engines actually define a post or a link that it was SEO purposes or not. So is it a decay of guest posting and we have to stop it for SEO purpose. I think NO search engines really think much different than you and me? But actually the smartest search engine of universe follow you and me and whatever we like it started to hate and a quality guest post on a quality site with no followed link won?t hurt you,me and search engines. I suggest that avoid low quality guest post with do follow link and stop searching seo footprints for guest posting find some real quality sites related to your content.