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name: build-clusters description: > Build a topical authority cluster from a seed keyword or topic. Use when the user asks about topic clusters, content silos, pillar pages, topical authority, content architecture, or how to structure content around a theme. For finding the right keywords, see find-keywords. For writing individual pieces, see brief. metadata: version: 1.0.0

Build Clusters

Build a topical authority cluster from a seed keyword using pillar-spoke structure, coverage scoring, and interlinking plans.

What is a Topic Cluster?

A topic cluster is a group of interlinked pages that collectively cover a subject area. Google evaluates topical authority at the cluster level — ranking a single page is harder if the site has no supporting content around the topic.

Structure:

• Pillar page — comprehensive overview of the broad topic (targets head term)
• Spoke pages — focused articles covering subtopics (target body/long-tail terms)
• Internal links — every spoke links to the pillar, pillar links to all spokes, spokes cross-link to siblings

Before You Start

Gather this context (ask if not provided):

1. Seed topic. The broad subject area to build authority around.
2. Existing content. Does the site already have pages on this topic? List them.
3. Business relevance. How does this topic connect to the product or service?
4. Content capacity. How many pieces can the team produce per month?

Step 1: Subtopic Discovery

From the seed topic, generate subtopics using these methods:

Search-derived:

• People Also Ask questions for the seed keyword
• Related searches at the bottom of SERPs
• Autocomplete suggestions (seed + a, b, c...)
• Competitor content analysis — what subtopics do top-ranking sites cover?

Intent-derived:

• Awareness: "what is [topic]", "why [topic] matters"
• Consideration: "best [topic] tools", "[topic] vs [alternative]"
• Implementation: "how to [topic]", "[topic] tutorial"
• Troubleshooting: "[topic] not working", "common [topic] mistakes"

Audience-derived:

• Beginner questions about the topic
• Advanced practitioner concerns
• Decision-maker evaluation criteria

Aim for 8-20 subtopics per cluster.

Step 2: Cluster Map

Organize subtopics into a structured cluster:

Pillar: [Broad Topic] (head term)
│
├── Spoke: [Subtopic 1] (body term)
│   └── Intent: informational
│
├── Spoke: [Subtopic 2] (body term)
│   └── Intent: commercial investigation
│
├── Spoke: [Subtopic 3] (long-tail)
│   └── Intent: transactional
│
├── Spoke: [Subtopic 4] (long-tail)
│   └── Intent: informational
│
└── ... (8-15 more spokes)

Step 3: Coverage Scoring

Score how well the existing site covers the cluster:

| Subtopic | Existing Page? | Quality (1-5) | Traffic | Gap? | |----------|---------------|---------------|---------|------| | [subtopic 1] | /blog/topic-1 | 4 | 500/mo | No | | [subtopic 2] | — | — | — | Yes | | [subtopic 3] | /blog/old-post | 2 | 50/mo | Partial (needs refresh) |

• Full gap — no existing page, needs creation
• Partial gap — page exists but is thin, outdated, or off-intent
• Covered — strong existing page, may just need internal linking

Step 4: Pillar Page Design

The pillar page should:

• Cover the topic comprehensively at an overview level (2,000-4,000 words)
• Link to every spoke page for deeper dives
• Be structured as a table of contents for the entire cluster
• Target the highest-volume keyword in the cluster
• Include a summary of each subtopic (2-3 paragraphs) with a link to the full spoke

Pillar page is NOT a mega-article that tries to cover everything in depth. It is a hub that distributes authority and directs readers to the right spoke.

Step 5: Interlinking Plan

Map the internal links:

| From Page | To Page | Anchor Text | Context | |-----------|---------|-------------|---------| | Pillar | Spoke 1 | "[subtopic 1] guide" | In the subtopic 1 overview section | | Spoke 1 | Pillar | "[broad topic]" | In the introduction or conclusion | | Spoke 1 | Spoke 2 | "[subtopic 2]" | Where subtopic 2 is mentioned contextually | | Spoke 3 | Spoke 1 | "[subtopic 1]" | Where comparison is relevant |

Rules:

• Every spoke links to the pillar (mandatory)
• Pillar links to every spoke (mandatory)
• Spokes cross-link to 2-4 siblings (where contextually natural)
• Use varied anchor text (not always the exact keyword)

Step 6: Cluster Health Metrics

Score the cluster's readiness to compete:

Coverage Score  = (Covered spokes / Total spokes) x 100
Link Health     = (Spokes with bidirectional pillar link / Total spokes) x 100
Content Quality = (Spokes scoring 3+ quality / Total spokes) x 100

| Metric | Score | Threshold | |--------|-------|-----------| | Coverage | [x]% | > 70% to start ranking for pillar keyword | | Link Health | [x]% | 100% is the target — every spoke must link to pillar and back | | Content Quality | [x]% | > 80% — clusters with thin spokes dilute authority |

Expected Outcomes by Health Level

| Cluster State | Coverage | Link Health | Content Quality | Expected Result | |--------------|----------|------------|----------------|----------------| | Incomplete | <50% | <70% | Any | Pillar unlikely to rank page 1; spokes rank individually at best | | Developing | 50-70% | 70-90% | 50-80% | Pillar may appear page 2-3; some spokes rank for long-tail | | Competitive | 70-90% | 100% | 80-90% | Pillar competes for page 1; most spokes rank for their targets | | Dominant | >90% | 100% | >90% | Pillar strong on page 1; cluster captures most queries in the topic |

Internal Link Standards per Cluster

| Link Type | Minimum Count | Direction | |-----------|-------------|-----------| | Pillar → each spoke | 1 per spoke | Downward — link from the relevant section of the pillar | | Each spoke → pillar | 1 per spoke | Upward — "our complete [topic] guide" | | Spoke ↔ sibling spokes | 2-4 per spoke | Lateral — where contextually natural | | Cross-cluster bridges | 0-2 per cluster | Between hubs — only with genuine topical relevance |

Cluster ready to compete: Coverage > 70%, Link Health = 100%, Content Quality > 80%. Below these thresholds, prioritize filling gaps before expecting the pillar to rank.

Step 7: Production Sequence

Order the content production for maximum impact:

1. Pillar page first — even as a draft, it establishes the hub
2. Highest-opportunity spokes next — pages targeting gaps with the best opportunity scores
3. Refresh existing spokes — update and relink any partial-gap pages
4. Remaining spokes — fill out the cluster over time
5. Update pillar — add links to each new spoke as it's published

Output Format

Topic Cluster: [seed topic]

Cluster Summary

• Pillar keyword: [keyword] (volume: [x], difficulty: [y])
• Total spokes: [count]
• Existing coverage: [x]% ([n] pages exist, [n] need creation)
• Total cluster volume: [sum of all keyword volumes]

Cluster Map [Visual structure from Step 2]

Coverage Scorecard [Table from Step 3]

Pillar Page Spec

• Target keyword: [keyword]
• Recommended title: [title]
• Structure: [heading outline with spoke links]

Interlinking Plan [Table from Step 5]

Production Roadmap [Ordered list from Step 6 with estimated timelines]

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Pro Tip: Use the free Blog Keyword Generator to discover subtopics for your cluster. SEOJuice MCP users get automatic cluster mapping — run /seojuice:content-strategy to see existing clusters with coverage metrics, or use list_clusters and get_cluster_detail to check cluster health and identify gaps.