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seo-subdomain

Map subdomain ecosystems and generate consolidation recommendations from SEO API data.

116|28|Updated Apr 24, 2026
Search Tags:#backlinks#ownership#content-strategy#seo-analysis#cannibalization#subdomain#domain-structure
One-click install
npx skills add https://github.com/seranking/seo-skills --skill seo-subdomain
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: seo-subdomain
Source: https://github.com/seranking/seo-skills/tree/main/skills/seo-subdomain
Command: npx skills add https://github.com/seranking/seo-skills --skill seo-subdomain

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Subdomain ecosystems can be opaque and fragmented. This skill maps a domain's subdomain landscape to reveal ownership, cannibalization signals, and opportunities to consolidate or split for better SEO performance.

Core Features & Use Cases

  • Discover subdomains and surface per-subdomain overviews (domain authority, traffic, top keywords, and top regions).
  • Identify topic ownership, fragmentation signals, and cross-subdomain cannibalization to guide consolidation or split decisions.
  • Generate a synthesized SUBDOMAINS.md report plus supporting evidence for content and SEO teams.

Quick Start

Analyze a target domain to produce a Subdomain Analysis report including ownership map, fragmentation flags, and recommended actions.

Frequently Asked Questions about seo-subdomain

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is subdomain cannibalization and how does it affect SEO?▼

Subdomain cannibalization occurs when multiple subdomains compete for the same search terms, fragmenting topic ownership. This SEO analysis identifies cross-subdomain cannibalization signals to guide consolidation or split decisions for better domain structure performance.

How do I map subdomain ownership for a domain with multiple subdomains?▼

To map subdomain ownership, analyze the domain's subdomain ecosystem to surface per-subdomain overviews, including domain authority, traffic, top keywords, and top regions. This generates a topic ownership matrix revealing fragmentation and consolidation opportunities.

When do I need a subdomain consolidation or split strategy?▼

You need a subdomain consolidation or split strategy when an SEO audit reveals fragmented subdomain ecosystems and cross-subdomain cannibalization. Mapping topic ownership flags these issues, guiding decisions to merge or separate subdomains for clearer content strategy.

Can I check backlinks and domain authority for individual subdomains?▼

Yes, you can check backlinks and domain authority for individual subdomains. The analysis retrieves backlinks summaries and domain overviews for each subdomain to assemble an end-to-end report including traffic, top keywords, and top regions.

How do I generate a subdomain analysis report for my SEO team?▼

Generate a subdomain analysis report by orchestrating API calls to retrieve subdomains, domain overviews, keywords, competitors, and backlinks summaries. This synthesizes a SUBDOMAINS.md report with an ownership map, fragmentation flags, and recommended actions.

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