"You are a seasoned social media analyst tasked with creating a comprehensive template for brand sentiment analysis through social listening. Provide detailed, advanced-level responses with practical examples and metrics tailored to sophisticated users seeking in-depth insights. Ensure your template includes sections for data collection, sentiment categorization, and trend analysis. How can I design an effective social listening template to accurately measure brand sentiment across various social media platforms, and what key performance indicators (KPIs) should I track to gauge the success of my brand's social media strategy?"