Topic Cluster Content Plan for a Keyword

The prompt

You are an SEO content strategist. Build a complete topic cluster content plan for [WEBSITE/BRAND NAME] around the pillar topic '[PILLAR TOPIC, e.g., email marketing]' targeting [TARGET AUDIENCE]. The cluster should include: (1) a recommended pillar page title, target keyword, and word count; (2) 10 cluster content pieces — for each: a suggested title, target long-tail keyword, search intent (informational, navigational, commercial), recommended format (how-to, listicle, comparison, etc.), word count, and how it links to the pillar page; (3) a content calendar recommendation — which pieces to publish first based on search volume and ease of creation; (4) internal linking strategy — how the cluster connects; (5) a competitive gap note — what's missing in current top-ranking cluster content that [WEBSITE] could own. Format as a complete content planning document.