Overview: This paper explains torrefaction, a thermochemical process that reduces the moisture content of wood biomass and increases its energy density, by transforming it into a charred material resembling charcoal. Highlighting the wood, which is a biological substance that lends itself well to the process of torrefaction when compared with other renewable resources, it details the torrefaction process, the equipment used and the characteristics of torrefied wood. The paper discusses the various ways in which the torrefied wood can be used and provides the reasons to use bio-coal. A glossary of few terms is also provided.