# What Is Topical Authority? Topic Clusters and the Pillar-Cluster Model

Author: Fatih Emin Çakıroğlu (https://fatihemincakiroglu.com)
Source: https://fatihemincakiroglu.com/en/blog/topical-authority
Published: 2026-10-20
Updated: 2026-10-20

Topical authority is an SEO concept describing how thoroughly, consistently and reliably a site covers a given subject. Instead of writing scattered pages for individual keywords, it means building connected content clusters that handle a topic together with all of its sub-questions.

The term is popular and often overstated. Below: what Google actually says, what it does not, and how I plan a pillar-cluster model.

> Short answer: Topical authority is not an official “authority score” Google measures for websites; it is a working framework for helping sites that cover a subject in depth to be understood better in search. In practice it is built from one main (pillar) page, supporting (cluster) pages that answer sub-questions, and the internal links that connect them.

## What is topical authority and what does Google say?

Google's documentation on helpful, reliable content lists questions you can ask about your own content, including “Does your site have a primary purpose or focus?” and whether the content clearly demonstrates first-hand expertise and a depth of knowledge. Topical authority is the practical answer to those two questions.

The place where Google uses the name “topic authority” directly is a news system described on the Search Central blog in May 2023. It helps surface expert sources for news queries in areas such as health, politics and finance, and it looks at signals like how notable a source is for a topic or location, original reporting and reputation.

> **Do not overstate it** Google does not define a measured “topical authority score” for non-news websites. Authority scores in SEO tools are each tool's own calculation, not a signal Google uses.

## How does the pillar-cluster model work?

The logic is simple: one pillar page that summarises a broad topic, cluster pages that each focus on a single sub-question, and meaningful internal links between them. The overall architecture is covered in the [content strategy guide](https://fatihemincakiroglu.com/en/guides/icerik-stratejisi); here I focus on planning and execution.

The example below is the kind of cluster I build for an industrial compressor manufacturer:

- /screw-compressor/ (pillar)
  - Selection and specs
    - /screw-compressor/capacity-calculation
    - /screw-compressor/pressure-selection
  - Cost
    - /screw-compressor/energy-consumption
    - /screw-compressor/maintenance-cost
  - Comparison
    - /screw-compressor/vs-piston-compressor

This works especially well for [B2B manufacturer websites](https://fatihemincakiroglu.com/en/industries/b2b-manufacturer-seo) with long sales cycles: every technical question asked during procurement becomes a cluster page.

## How do you plan a topic cluster step by step?

I build a cluster map in five steps. Getting the map right before writing prevents pages that later compete with each other.

**Topic cluster planning process**
1. **Define the topic**: Pick a subject that matches your business goals and where you have real expertise.
2. **Collect questions**: Search Console queries, questions sales and support teams hear, related questions in search results.
3. **Group by intent**: Queries that share the same search results belong on one page.
4. **Assign pillar and clusters**: Broad intent goes to the pillar, specific questions go to clusters.
5. **Flag gaps and overlaps**: List missing subtopics and existing pages targeting the same query.

For grouping I use the SERP similarity method from the [keyword research guide](https://fatihemincakiroglu.com/en/guides/anahtar-kelime-arastirmasi): if two queries return largely the same URLs on page one, Google treats them as the same need and one page is enough.

## What is the difference between pillar and cluster pages?

The two page types do different jobs; mixing them up produces either a bloated pillar or repetitive clusters.

| Attribute | Pillar page | Cluster page |
| --- | --- | --- |
| Scope | Summarises the whole topic | Covers one sub-question in depth |
| Target query | Broad, general-intent term | Long-tail, specific question |
| Depth | Short intro to each subtopic, links for detail | Steps, examples, tables, decision criteria |
| Links | Links to every cluster | Links to the pillar and related clusters |
| Updates | When a new cluster is added | When the facts on the topic change |

The most common problem I see in audits is a pillar and a cluster targeting the same query. The two pages then compete; either their scope is clarified or they are merged.

## How should internal links work inside a cluster?

Internal links hold the cluster together. Google's link documentation says every page you care about should have a link from at least one other page on your site; inside a cluster I aim higher:

- The pillar links to every cluster from within the relevant section, using descriptive anchor text.
- Each cluster links back to the pillar within the flow of the text.
- Clusters link to each other only when they are genuinely related for the reader.
- The pillar is also reachable from the menu or breadcrumbs.
- No cluster is left orphaned; when a new page goes live, related older pages are updated too.

I cover anchor text, click depth and auditing in detail in the [internal linking strategy](https://fatihemincakiroglu.com/en/blog/ic-linkleme) article. For the technical side of crawling and site architecture, see the [technical SEO guide](https://fatihemincakiroglu.com/en/guides/teknik-seo).

## Common mistakes when building topical authority

**What works**
- Each page answers a distinct question
- The topic matches your business and expertise
- The cluster grows slowly but consistently
- Older pages are reviewed regularly

**What backfires**
- Several similar pages for the same query
- Drifting into unrelated topics for traffic
- Hundreds of shallow pages in a short time
- Content that is published and forgotten

Mass-produced near-identical pages usually add risk, not value; see the [programmatic SEO](https://fatihemincakiroglu.com/en/blog/programatik-seo) article for where Google's spam policies draw the line. To decide what to do with weak older pages in a cluster, see the guide on [content pruning and content updates](https://fatihemincakiroglu.com/en/blog/content-pruning).

## How do you track topical authority over time?

There is no single metric. In the Search Console Performance report I filter the cluster's URLs and track impressions, the number of distinct queries and average position monthly. As the cluster grows, appearing for more distinct queries on the topic is the expected pattern.

If you want a cluster map for your own field, we can work on it through my [content strategy service](https://fatihemincakiroglu.com/en/content-strategy). To review it alongside the overall state of your site, see [SEO consulting](https://fatihemincakiroglu.com/en/seo-consulting) or simply [book an intro call](https://fatihemincakiroglu.com/en/book-a-call).

## Frequently Asked Questions

### How many pieces of content do I need for topical authority?

There is no fixed number. The test is whether the important questions your audience asks about the topic have been answered. Ten strong pages on a narrow topic can form a more coherent cluster than fifty scattered pages on a broad one.

### Can a small website build topical authority?

Yes; a narrow focus is an advantage. A site that concentrates on one service or product group and answers its questions in depth sends a clearer topical signal than a broad, shallow site.

### How long should a pillar page be?

Word count is not the goal. A pillar should map the topic, introduce each subtopic briefly and send readers to the right cluster. If it starts doing a cluster's job, it is too long.

### Does having posts on unrelated topics hurt my site?

It is not a penalty in itself, but it blurs the site's focus. Reviewing traffic-driven content unrelated to your business and updating, merging or removing it is usually time well spent.

### Is topical authority the same as E-E-A-T?

No. Topical authority is about how thoroughly a subject is covered; E-E-A-T is about who created the content, with what experience, and how trustworthy it is. The two complement each other; see [showing E-E-A-T in your content](https://fatihemincakiroglu.com/en/blog/eeat-icin-icerik) for details.

### Do topic clusters help visibility in AI answers?

Claiming a definite effect would be wrong. According to Google's documentation, AI Overviews and AI Mode can break a question into subtopics and run several related searches; a cluster that answers each sub-question clearly offers content that can serve as a source for more of those searches.

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Please attribute as: "Fatih Emin Çakıroğlu (fatihemincakiroglu.com)". Original: https://fatihemincakiroglu.com/en/blog/topical-authority