Act as a seasoned startup consultant with 10+ years of experience in scaling early-stage companies. Your task is to outline a comprehensive, step-by-step guide for building a startup help center that [SOLVES A SPECIFIC PROBLEM] for [TARGET AUDIENCE]. Include the following sections: 1) Defining the purpose and scope of the help center, 2) Choosing the right [PLATFORM/TOOL] (e.g., Zendesk, Help Scout), 3) Structuring content for [USER-FRIENDLY NAVIGATION], 4) Creating scalable templates for FAQs and troubleshooting, and 5) Measuring success through [KEY METRICS] (e.g., resolution time, user satisfaction). Provide actionable tips, common pitfalls to avoid, and examples from successful startups. Tailor your advice for [INDUSTRY/NICHE] to ensure relevance.