build-clusters（建立集群）

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:

• 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• Partial gap — page exists but is thin, outdated, or off-intent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:

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

Expected Outcomes by Health Level

Internal Link Standards per Cluster

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]

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.