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):
- Seed topic. The broad subject area to build authority around.
- Existing content. Does the site already have pages on this topic? List them.
- Business relevance. How does this topic connect to the product or service?
- 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:
- Pillar page first — even as a draft, it establishes the hub
- Highest-opportunity spokes next — pages targeting gaps with the best opportunity scores
- Refresh existing spokes — update and relink any partial-gap pages
- Remaining spokes — fill out the cluster over time
- 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]
Pro Tip: Use the free Blog Keyword Generator to discover subtopics for your cluster. SEOJuice MCP users get automatic cluster mapping — run/seojuice:content-strategyto see existing clusters with coverage metrics, or uselist_clustersandget_cluster_detailto check cluster health and identify gaps.