SEO LocalHub-and-Spoke Architecture Explained
The Hub
The hub is the primary service page: broad, comprehensive, and targeting the primary commercial keyword. "Roofing Services" or "HVAC Repair and Installation" are hub pages. They link down to every sub-topic page and up to the homepage.
The Spokes
The spokes are the sub-topic pages: specific, targeted at a narrower query, and linking back to the hub. "Metal Roofing Installation," "Asphalt Shingle Roofing," "Emergency Roof Repair," and "Roof Replacement Cost Guide" are spoke pages in the roofing cluster.
The Cluster
All hub and spoke pages in a topic domain, interconnected with internal links using descriptive anchor text. Google's crawler follows the internal links and builds a picture of the business's expertise depth in that domain.
Why Clusters Outperform Individual Pages
Google's algorithm has shifted significantly toward entity and topic modeling (Source: Google Search Central, "How Search Works," 2025). An isolated "roof replacement" page signals a business that mentions roof replacement. A cluster of 6-8 interconnected pages on roofing, all internally linked, all with consistent entity signals, all citing each other, signals a business that is an authority on roofing. The cluster produces stronger rankings on the primary hub keyword than the isolated page ever will. In our Managed Website builds, we have seen hub pages jump from page 2 to top-5 organic positions within 60 days of completing the spoke pages that support them.
A roofing company with 8 content pages in the roofing cluster gets 8x the internal link equity signals, 8x the FAQPage schema opportunities, 8x the AEO content that can appear in AI Overviews, and 8x the entry points from organic search. One page does none of this.
How Many Clusters Does a Local Business Need?
One cluster per primary service category, minimum. A business with 3 primary service categories (roofing, gutters, siding) needs 3 content clusters, each with a hub page and 4-6 spoke pages. A business with one primary service category still needs the cluster, hub plus spokes within that single category.
For local service businesses, a typical minimum architecture: 3-5 clusters with 5-7 pages each is 15-35 total pages. This is the level of content depth at which topical authority signals become strong enough to influence rankings in competitive markets.
Building Topical Authority With Blog Content
Blog posts contribute to topical authority when they are strategically linked into the cluster structure. A blog post on "What to Look for After a Hail Storm" belongs in the roofing cluster, it should link to the "Storm Damage Roofing" spoke page, which links to the "Roofing Services" hub. The post earns its place in the cluster through internal linking, not just by existing on the domain.
Blog posts that are disconnected from any cluster, generic industry news, off-topic content, do not contribute to topical authority regardless of how frequently they are published. Volume without cluster integration is wasted.