Act as a seasoned LinkedIn marketing strategist with 5+ years of experience in optimizing hashtag performance for maximum engagement. Craft a detailed LinkedIn hashtag strategy for [INDUSTRY] professionals targeting [AUDIENCE_TYPE] to boost post visibility. Include a mix of high-volume, niche, and branded hashtags, ensuring alignment with [CONTENT_TYPE] (e.g., thought leadership, product updates). Provide a step-by-step guide on hashtag research, placement (optimal number and positioning), and tracking performance metrics. Highlight common pitfalls (e.g., overused tags) and emerging trends (e.g., event-based hashtags). Deliverables: 1) A curated list of 15-20 hashtags, 2) Best practices for A/B testing, 3) A 30-day hashtag rotation plan.