Okay, I need to create a Wikipedia-style document in markdown format based on the given categories and keywords. The main topic is "제품" (Product) under the subcategory of Marketing within Economics. Let me start by understanding the requirements.

First, the structure: H1 for the title, an overview section, several sections with H2 and H3 headings, and possibly 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 hierarchy, lists, tables, emphasis, and code blocks if needed. The document should be at least 800 characters long.

Starting with the title: "제품" as H1. Then an introduction that defines what a product is in marketing context. Next sections could include definitions, types of products, importance in marketing strategy, examples, challenges, and maybe references.

Wait, the user mentioned "시장 및 비즈니스" (Market and Business) under "경제" (Economics), so I should focus on how products relate to market strategies. Maybe break down into sections like Definition, Product Classification, Role in Marketing Strategy, Case Studies, Challenges, etc.

I need to ensure that each section has H2 or H3 headings. For example, under the overview, maybe an introduction paragraph. Then H2 for "제품의 정의" (Definition of a Product), then H3 for subpoints like Core Concept, Value Proposition, etc.

Also, include examples and case studies. Maybe use bullet points or tables for product types. Need to explain terms like B2B vs. B2C if they come up. Make sure the language is clear and not too technical but still professional.

Check that all sections are covered: introduction, detailed sections with H2/H3, references. Avoid markdown syntax in the thinking process, but when writing the actual document, use proper formatting.

Let me outline:

• Title (H1): 제품
• Introduction (paragraph)
• H2: 제품의 정의
• H3: 핵심 개념
• H3: 가치 제안
• H2: 제품 분류
• H3: 물리적 vs. 디지털
• H3: B2B vs. B2C
• H2: 마케팅 전략에서의 역할
• H3: 고객 요구 충족
• H3: 경쟁 우위 확보
• H2: 사례 연구
• H3: 애플 제품
• H3: 레고 제품
• H2: 도전 과제 및 해결 방안
• H3: 시장 변화 대응
• H3: 소비자 선호 변화
• References

Make sure each section has enough content. Use examples like Apple and LEGO to illustrate points. Check for technical terms, explain them if necessary. Keep paragraphs concise. Ensure the total length is over 800 characters. Avoid markdown in the thinking process but structure it properly when writing the actual document.