Long tail keywords are phrases that usually trail on for more than 2 phrases. For example, “high top red sneakers” would be a long tail phrase for someone looking for that specific style of sneaker. With shorter keywords getting tougher to rank for many website owners and businesses are always seeking out long tail phrases to get quick organic visibility.
Some have felt that recent algorithm and Google technology changes have killed off the long tail phrase. Below is an infographic from the folks at SEOBook.com showcasing how this might have occurred.