Topic Clusters Explained: How to Plan Blog Posts That Rank Together

Short answer: a topic cluster is one main page that covers a subject broadly, supported by several shorter posts that each answer one specific question, all linked together. It shows Google and AI tools that you know the topic deeply, and it guides readers from a question to your service. Plan one cluster per main service.

Many business blogs are a pile of unrelated posts: a holiday greeting, an industry news item, a tip, a product launch. Each one stands alone and few rank. A topic cluster replaces that pile with a plan.

How does a topic cluster work?

Imagine a solar installer. The main page is "Solar Panels for Homes in Sri Lanka: Costs, Savings and How It Works". Around it sit focused posts:

• How much does a 5kW solar system cost?
• On-grid vs off-grid solar: which suits your home?
• How long do solar panels last in Sri Lankan weather?
• What is net metering and how does it work?
• How to choose a solar installer.

Each post links to the main page, and the main page links to each post and to the service page.

Why does this work better than random posts?

Google sees a group of pages that cover a subject thoroughly and link together, which signals expertise. Readers find the next answer they need without leaving. AI tools see a complete, consistent source and are more likely to quote it.

How do you plan a cluster?

1. Pick a topic tied to a service you sell. Not a hobby topic.
2. List the questions buyers ask. Use customer calls, People Also Ask and Search Console.
3. Choose the main page. It covers the topic broadly and links to the service.
4. Group the questions. Each distinct question becomes a supporting post.
5. Plan the links. Every supporting post links to the main page and the service page.

How long should each post be?

As long as it takes to answer the question well. A focused post can be short if it fully answers one question. The main page is usually longer.

In what order should you publish?

Publish the main page first, then the supporting posts that are closest to buying, such as costs, comparisons and how to choose. Leave general background topics for later.

How do you know the cluster is working?

In Search Console, filter by the cluster's pages. Rising impressions for many related questions, and clicks from posts into your service page, show it is working.

Planning clusters is part of our SEO service. Want a cluster plan for your main service? Request a free growth audit.