High Quality Content by WIKIPEDIA articles! Monster.com is one of the largest employment websites in the world, owned and operated by Monster Worldwide, Inc. Monster is one of the 20 most visited websites out of 100 million worldwide, according to comScore Media Metrics (November 2006). It was created in 1999 by the merger of The Monster Board (TMB) and Online Career Center (OCC), which were two of the first and most popular career web sites on the Internet. Monster is primarily used to help those seeking work to find job openings that match their skills and location.