Copyscape is one of the best ways to weed out credible guest posting as opposed to the copy and pasted same old text over and over. Not only could these type of guest post spammers hurt you, but it could easily lack credible information.
Copyscape helps eliminate having duplicate guest posts on the internet. Simply use their app to check to see if any of the text or entire posts have been posted previously. If it has not been posted before and has credible information then it probably wouldn’t be a bad article for someone to use as a guest post on your website.
Contributor: Michael Russell from ratchetstraps.com