E2H Earth to Humans Case Study | Semantic SEO
Case Study

E2H — Earth to Humans: Topical Map Expansion and Entity-Based Architecture

An 8-month engagement focused on expanding an incomplete topical map and rebuilding content architecture around entities, growing organic traffic by 200%.

01The Situation

E2H (Earth to Humans) had an existing topical presence in its space, but that presence was incomplete — covering parts of its core subject well while leaving adjacent, closely related sub-topics thin or entirely absent.

This is a common pattern for sites that grew organically without a deliberate topical map: individual pieces of content can rank and perform reasonably, but the site as a whole never accumulates the breadth of coverage search engines look for when deciding whether a domain is a genuine authority on its subject versus a partial contributor to it. Without that breadth, growth tends to plateau well below the site’s real potential.

02The Approach

The engagement centered on two connected pieces of work: expanding the topical map, and rebuilding content architecture around entities rather than isolated keywords.

Topical map expansion Identified the sub-topics and related entities within E2H’s subject area that were missing or underdeveloped, and sequenced new content to close those gaps systematically — the same methodology detailed on our topical authority page.
Entity-based content architecture Restructured how existing and new content connected to one another, organizing pages around the entities they represented so that internal linking and hierarchy reflected genuine topical relationships rather than an arbitrary folder structure.
Consolidation and expansion in parallel Where existing pages already covered part of a sub-topic, they were strengthened and connected into the new map; where coverage was entirely absent, new pages were built to complete it.

The goal throughout was for the site to read — to both users and search engines — as a complete, coherent source on its subject rather than a collection of individually optimized pages.

03Timeline

The engagement ran 8 months.

Topical map expansion is inherently a phased process: gaps are prioritized, content is built and published in sequence, and the architecture connecting it is refined as new pages go live. The 8-month timeline reflects that full cycle, from initial gap analysis through to a topical map that had been substantially built out and interlinked.

04The Result

Organic traffic grew 200% over the course of the engagement.

The growth reflects the compounding effect typical of topical map expansion: individual new pages contribute incrementally, but the larger gain comes from existing pages ranking better once they sit inside a more complete, better-interlinked topical structure rather than performing in isolation.

MetricChange
Organic traffic+200%
Engagement length8 months
See more topical authority engagements on the case studies hub.

05A Note on Anonymization

This case study is anonymized at the client’s request. Industry, engagement length and measured outcomes are shown; identifying details — including the site’s name, URL, and any screenshots — are withheld without client permission.

About the author

Ayon Chowdhury (Ayonchy) is a Semantic SEO strategist and the founder of SemanticOS. He works on entity-based optimisation, topical maps and content systems that search engines can model without guessing — across 212+ brands in the US, UK, UAE and Bangladesh. Author of Content Gap Analysis For SEO Boosting.