Okay, I need to create a Wikipedia-style document about "Target Customer Definition" under the categories of Economics, Market and Business, Marketing. Let me start by understanding the requirements.

First, the structure: H1 for the title, an overview section, several sections with H2 and H3, and maybe references or related documents. The content needs to be accurate, objective, detailed enough, easy to read, and use professional terms with explanations. Also, markdown formatting with proper headings, lists, tables, code blocks if needed, and at least 800 characters.

Starting with the title: "타겟 고객 정의" as given. Then an overview section explaining what target customer definition is, its importance in marketing. Next sections could be components of defining a target audience, methods to identify them, challenges, case studies, etc. Maybe include examples or steps involved.

For the components, I can break it down into demographic, geographic, psychographic, behavioral factors. Each of these can be an H2 section with sub-sections (H3) for details. Methods could include market research techniques like surveys, data analysis, competitor analysis. Challenges might involve changing consumer behavior, data accuracy, competition. Case studies would provide real-world examples.

I need to make sure each part is explained clearly, using terms like "demographic segmentation" and explaining them briefly. Also, check that the content flows logically from introduction to details, then challenges and examples. Avoid being too technical but still professional. Maybe add a section on tools or technologies used in defining target customers, like CRM systems or analytics software.

Wait, the user mentioned code blocks if there are technical contents. But since this is about marketing strategy, maybe not necessary unless discussing data analysis code. Probably not needed here. Focus on explanations and examples.

Check for 800 characters: The initial draft should be long enough. Let me outline each section with bullet points or sub-sections to ensure depth. Also, include references or related documents at the end if possible, like links to marketing theories or case studies.

Make sure the language is clear and concise, avoiding jargon without explanation. For example, when mentioning psychographic factors, explain that they relate to lifestyle, values, etc. Use tables for comparing different segmentation types if needed.

Now, start drafting each section step by step, ensuring all requirements are met.