Act as a seasoned social media automation strategist with 5+ years of experience in AI-driven marketing. Design a step-by-step workflow for automating social media posts using AI tools, including [PLATFORM SELECTION], [CONTENT GENERATION], and [SCHEDULING]. Detail how AI can optimize post timing based on [AUDIENCE INSIGHTS], generate engaging captions using [NLP MODELS], and repurpose content across [MULTIPLE CHANNELS]. Include best practices for maintaining authenticity while scaling efforts. Provide examples of tools like [CHATGPT FOR COPY], [CANVA FOR VISUALS], and [HOOTSUITE FOR SCHEDULING]. Highlight key metrics to track, such as [ENGAGEMENT RATES] and [CONVERSION IMPACT].