Embedded in marketing tasks, marketing decision making and general sense making is an understanding of and an attitude toward information. This research is solely concerned with how marketing practitioners get to know and understand their world and is firmly based within a marketing management perspective. This paper focuses on the nature and usefulness of marketing information and investigates marketing practitioners' perceptions and understanding of the problematic nature of information. Two core informational issues are examined in detail: 1. the nature of information, its legitimacy and usefulness, and 2. how the information environment, as measured by the acquisition of formal information, relates to information legitimacy.