build-clusters

SKILL.md

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-strategy to see existing clusters with coverage metrics, or use
list_clusters and get_cluster_detail to check cluster health and identify gaps.