Act as a [Product Manager] with [5+ years of experience in AI-driven customer insights]. Your task is to analyze [customer reviews] for [a new product launch] using AI-powered sentiment analysis. Describe step-by-step how to: (1) Collect and preprocess [raw review data] from [e-commerce platforms/social media], (2) Train or fine-tune a [sentiment analysis model] (e.g., BERT, GPT-3.5) to categorize reviews as [positive/neutral/negative], (3) Visualize trends and key themes using [dashboards/NLP tools], and (4) Translate insights into [product improvements/marketing strategies]. Include examples of [specific phrases or emojis] that influence sentiment scores. Focus on accuracy, scalability, and actionable outcomes for [stakeholders].