A topic cluster is one pillar page plus multiple supporting articles that link together. It matters because it helps you build topical authority and makes internal linking (and content planning) straightforward.
The easiest way to build a cluster is to start from real search intent (autocomplete, related searches, and questions), then organize it into one pillar and multiple supporting articles.
A pillar page is the broad “hub” page you want to rank for. It should match a big intent, be evergreen, and be broad enough that you can naturally link 5–20 supporting posts into it.
A good pillar topic is usually:
Broad (but still specific to your site’s niche)
A topic where you can write a definitive guide
Something that naturally breaks into sub-topics (how-tos, comparisons, FAQs, product guides)
Cluster posts are the supporting articles that target narrower queries. The fastest way to find them is to let Google show you the angles people already care about.
Autocomplete suggestions (common phrasing + long-tail queries)
Related searches (adjacent keywords Google associates with your query)
People-also-ask style questions (perfect for supporting articles and internal links)
Competitor outlines (their headings often reveal sub-topics you should cover)
If you want a simple process, use this:
Once you know the method above, Massblogger automates the most time-consuming parts: collecting SERP signals and turning them into a clean pillar + cluster structure you can save and write from.
SerpAPI is a service that lets you fetch Google search results and SERP features programmatically.
Instead of guessing what to write about, we use it to pull real search signals around your seed keyword and use those signals as “raw material” for the cluster.
Autocomplete-style suggestions that reveal common phrasing and long-tail queries
Related searches that show adjacent topics Google associates with your query
People-also-ask style questions that often become high-performing supporting posts
After SerpAPI provides the raw SERP ideas, our AI organizes them into a publishable plan. It groups by intent, removes duplicates, proposes clean titles, and structures everything as pillars with supporting cluster posts.
SerpAPI keeps the plan grounded in real demand, and the AI turns messy SERP ideas into a structured publishing roadmap that’s easy to execute.
Multiple pillar topics (broad pages you can treat as hubs)
For each pillar: a list of cluster articles (supporting posts to publish next)
Optional keyword hints for each pillar and cluster (useful for titles, headings, and internal links)
Auto-writing: generate full drafts from the topics you saved and publish or schedule them
Topic and keyword tracking: we mark topics as used when you publish and help you avoid duplicate content over time
You can use the Topic Generator in AI-only mode, but connecting SerpAPI usually gives more accurate clusters because it’s grounded in real search data.
Need help? Contact us at support@massblogger.com