Google Fred was a series of mysterious Google Search updates which occurred in March 2017. The name was given to these updates jokingly by Gary Illyes, webmaster trends analyst at Google. Illyes wrote that from now on every Google Search update will be called Fred unless stated otherwise.[1][2][3]
Google Fred had a big impact on the Google rankings of websites worldwide. Initially most SEO news websites reported that Google Fred looked at the quality of websites, however, Illyes subsequently stated that Google Fred was not just one update but several different updates.[4] Some experts says that the affected sites besides have low-quality backlink profile in common – meaning that the sites that link back to them all have low domain authority[5].