The Types system in Open Leads gives users a great deal of flexibility in managing and sorting your leads. While the Opportunities and Pipeline System allows you to flag a lead as a Hot, Warm, Cold or Closed lead, Types allows you to build upon this by creating segments of your lead list - such as Current Customers, Website Leads, Walk-ins, Phone Leads, etc.
Lead segmenting using Types means that you can break up your marketing and handle these segments in different manners if you wish.