SEO Case Study: Digital Agency Bangkok Builds Authority and AI Search Visibility for SEICO Thailand

Executive Summary

SEICO Thailand (seico.co.th) is a B2B steel structure and pre-engineered building (PEB) manufacturer serving industrial clients across Thailand and the wider ASEAN region. When Digital Agency Bangkok (DAB) onboarded the client in early January 2026, the website had zero organic traffic, zero ranking keywords, and a Domain Rating of 0 — a clean slate that required a full-stack SEO programme from the ground up.

Over five months, DAB executed an integrated strategy combining traditional Search Engine Optimisation (SEO), Answer Engine Optimisation (AEO), and Generative Engine Optimisation (GEO). The results substantially exceeded every projected KPI:

* CTR dilution is expected and healthy when impression volume surges; the site is capturing far more diverse queries.

Performance Before 

Performance After

Client & Challenge

About SEICO Thailand

SEICO Thailand is a 22-year-old industrial construction company specialising in pre-engineered steel buildings (PEB), steel mezzanines, truss deck / SP deck floor systems, cold storage facilities, GMP food factory design, data centres, and logistics warehouses. The company targets project owners, factory developers, and industrial investors across Thailand, with a growing international footprint in Vietnam and Myanmar   

SEICO https://seico.co.th/

Starting Position (January 2026)

The website had recently been launched and presented a classic new-site challenge:

• Health Score: 89 — technically sound but carrying 139 errors, 459 warnings, and 153 notices (large images, missing alt text, 25 broken links, 21 redirects, 6 duplicate meta descriptions, 4 orphan pages)
• Domain Rating (DR): 0 — no external authority
• Referring Domains: 1 (digitalagencybangkok.com only)
• Organic Keywords: 0 ranked
• Organic Traffic: 0 visits
• AI Citations: 0 across Google AI Overviews, ChatGPT, Perplexity, Gemini, and Copilot
• Google Search Console: 6 total clicks and 162 impressions over the trailing 3-month window — effectively invisible

The core challenge: establish topical authority in a competitive B2B niche (industrial construction) from scratch, while simultaneously preparing the site for emerging AI search surfaces — without the luxury of an existing backlink profile or content library

Strategy

DAB designed a three-pillar framework: SEO (traditional search), AEO (AI answer engines), and GEO (generative / AI-native discovery). These were executed in parallel rather than sequentially, recognising that AI search engines were already drawing significant referral traffic.

SEO — Traditional Search Engine Optimisation

Keyword Universe

A 30-keyword seed list was established at baseline, covering both Thai-language commercial terms (e.g., บริษัทโครงสร้างเหล็ก, รับผลิตโครงสร้างเหล็ก, อาคาร PEB, โกดัง PEB) and English-language technical terms (PEB Thailand, steel structure, steel mezzanine, truss deck). The strategy prioritised long-tail informational queries to build topical authority before targeting high-competition commercial keywords.

Content Development

Content was identified as the primary lever given the zero-authority starting point. DAB established a cadence of 16 articles per month published in bilingual pairs (English + Thai), ensuring maximum geographic and linguistic coverage for a company serving both local Thai buyers and international investors scouting Thailand factory locations.

May 2026 topics reflected deliberate topical expansion beyond core steel structures into adjacent high-value industrial verticals: cold storage, GMP food factory design, logistics warehouse automation, data centre infrastructure, and northern Thailand industrial zones — each representing a distinct buyer persona and keyword cluster.

Internal Linking

With no external backlink profile to rely on, internal authority distribution became critical. DAB performed large-scale internal linking optimisation across 40 Thai blog posts and 34 strategic service/landing pages, implementing contextual keyword-based anchor text, topic cluster cross-linking, and authority flow to commercial conversion pages.

Technical SEO

On-page work included title tag and meta description optimisation, header structure improvements, image alt text completion, and PageSpeed improvements on desktop (achieving a score of 91 vs 63 on mobile at baseline). Core Web Vitals monitoring, sitemap health, and indexation checks were maintained throughout.

AEO — Answer Engine Optimisation

AEO focuses on structuring content so that AI-powered answer surfaces — Google AI Overviews, Bing Copilot, ChatGPT, Perplexity, and Gemini — can confidently cite the site as an authoritative source. DAB implemented the following:

• FAQ schema and structured data additions to key landing pages
• Content written to directly answer grounding queries (specific questions AI engines use to build answers), not just optimised for keyword density
• Entity-based content: articles consistently defined and explained core concepts (what is a PEB building, what is truss deck, GMP compliance for food factories) to establish topical entity authority
• External references within articles to signal credibility to AI evaluators
• Calls-to-action designed around conversion signals that AI systems could interpret as trust indicators

 GEO — Generative Engine Optimisation

GEO is the practice of making a website machine-readable and discoverable by AI agents and crawlers operating beyond traditional search engine bots. DAB implemented a suite of emerging AI discovery standards:

• Link Headers (RFC 8288) — structured link relations enabling AI agents to traverse the site graph
• API Catalog (RFC 9727) — machine-readable catalogue of site APIs
• MCP Server Card — Model Context Protocol endpoint for AI agent integration
• Agent Skills Discovery Index — structured declaration of the site's functional capabilities for AI agents
• WebMCP Browser Tools — browser-level discovery hooks for AI-assisted browsing sessions

These endpoints were maintained and validated continuously, positioning SEICO as an early mover in AI-native discoverability — a differentiated advantage in the industrial B2B space

Execution Timeline

Latest Results

Organic Search (SEO)

* Average position declined nominally because Google indexed and ranked a much larger keyword set in May. When more new queries enter the ranking ecosystem, the blended average naturally shifts. The 108% click growth confirms that net ranking quality improved significantly.

Top performing pages (last 28 days to May 31, 2026):

• SEICO Thailand homepage — 52 clicks, +117% growth
• What is a PEB Building? — 18 clicks, +500% growth
• Cold Storage & Temperature-Controlled Warehouse (TH) — 17 clicks, new
• Cold Storage & Temperature-Controlled Warehouse Design (TH) — 16 clicks, new
• Data Center Design & Construction (TH) — 15 clicks, new

Top performing queries (last 28 days):

• seico — 20 clicks (+100%)
• truss deck — 5 clicks (+25%)
• sp deck — 4 clicks (+100%)
• construction company in thailand — 1 click (new entry)
• data center design — 1 click (new entry)
• pre-engineered steel structure — 1 click (new entry)

Answer Engine Results (AEO)

The AI Citation dashboard (Microsoft Copilot / Bing AI, tracked via Ahrefs AI tracking, period May 1–31, 2026) recorded 253 total citation instances across AI-generated responses, with SEICO holding a 47.38% Share of Authority (SoA) for its tracked query set

Top cited pages by citation volume:

• Factory Layout Design Thailand (Thai) — 60 citations
• GMP Food Factory Builder Guide (English) — 47 citations
• Steel Structure Overview (Thai) — 19 citations
• What is Truss Deck Factory Floor System (English) — 18 citations
• GMP Food Factory Builder Guide (Thai) — 15 citations

ChatGPT, Perplexity, and Gemini citation tracking was established at baseline but showed 0 references in the initial report — by May, traffic analytics confirmed referrals arriving from ChatGPT (15 sessions this month vs 11 last month) and Perplexity (1 session), confirming AI engines are actively surfacing SEICO content.

Generative Engine Results (GEO)

Traffic by source data from site analytics revealed a notable AI referral pattern:

The appearance of ChatGPT, copilot.com, and Perplexity as distinct traffic sources — with ChatGPT already in the top 4 referrers — validates the GEO infrastructure investment. These are visitors arriving not from a traditional search results page but from inside a generative AI interface, clicking a cited source. This channel did not exist for SEICO five months ago.

Conversion Signals

Smart event tracking recorded positive conversion momentum across both periods:

While absolute conversion numbers are modest and consistent with an early-stage organic programme, the pattern is healthy: contact and outbound intent events are the dominant conversion types, appropriate for a B2B industrial product with a long sales cycle.

Performance vs Projected KPIs

Analysis & Key Learnings

Why the Results Exceeded Expectations

Several factors compounded to produce above-forecast results in month 5:

• Bilingual content multiplier: Publishing each article in both Thai and English effectively doubled the keyword surface area for every content asset. Thai-language content captured local industrial buyers searching in native language, while English content captured international investors researching Thailand factory locations — different personas with different intents, both commercially valuable.
• Topic cluster acceleration: By expanding beyond core steel structure keywords into adjacent GMP, cold storage, data centre, and logistics warehouse verticals, SEICO's content began ranking for queries that established competitors had not yet targeted with dedicated content. New verticals = lower competition = faster rankings.
• Internal linking as a backlink substitute: With DR 0 and a single referring domain, internal linking was the primary mechanism for distributing PageRank within the site. The 40+34 page linking programme ensured that new articles did not sit as isolated orphan pages but were embedded into a navigable topic graph — significantly improving crawlability and authority flow.
• GEO ahead of the market: The AI discovery infrastructure (MCP, RFC 8288 Link Headers, API Catalog) was implemented when most Thai B2B websites had not considered AI crawler accessibility. Being an early-mover in a niche with low AI-readiness competition produced disproportionate citation share.

The AEO Advantage in B2B

A 47.38% Share of Authority for grounding queries in the industrial construction space is a significant result for a site that was invisible 5 months prior. In B2B, AI citations carry particular weight: procurement managers and engineering consultants increasingly use AI tools to shortlist suppliers, understand technical specifications, and benchmark options. Appearing in those answers positions SEICO not just as a search result, but as an authority that AI tools recommend.

The 'gmp facility' query generating 47 citations is an instructive example. GMP (Good Manufacturing Practice) facility design is a high-intent commercial query from food and pharmaceutical manufacturers. SEICO's content was cited in nearly 30% of all AI answers for that query — effectively placing the brand inside the research phase of the buyer journey for a high-value industrial project type.

CTR in the Context of Impression Surge

The average position dropping from 7.9 to 9.9 while clicks more than doubled requires contextual interpretation. When a site ranks for 0 keywords in month 1 and then ranks for hundreds of keywords by month 5, the blended average position will naturally dilute because most new rankings start in positions 10–20 before climbing. The correct metric to watch is absolute click volume (up 108%) and the fact that CTR improved from 2.0% to 2.3% despite the impression surge — indicating that the new rankings are generating relevant clicks, not just impressions.

Conclusion

The SEICO Thailand case demonstrates that an integrated SEO + AEO + GEO strategy can generate compounding returns from a zero-baseline position within a five-month window, even in a competitive B2B niche with no initial domain authority.

The key differentiators were:

• Content volume and bilingual depth, creating a keyword surface area large enough to capture diverse buyer intents
• Internal linking as a domain authority substitute during the backlink acquisition phase
• Early GEO infrastructure investment, yielding disproportionate AI citation share before competitors entered the space
• AEO content design, ensuring that the articles answered specific grounding queries that AI answer engines use to build responses — converting content into brand presence inside AI tools

The 108% click growth in May 2026 — exceeding the 15–25% projection by approximately 4x — is not an anomaly. It reflects the compounding effect of 5 months of consistent execution across technical SEO, content, internal linking, and AI readiness. The site is now entering a growth phase where each new article reinforces the existing topic graph, each new internal link amplifies authority distribution, and each new AI citation increases brand discovery in channels that are growing faster than traditional search.

For the industrial construction sector in Thailand, SEICO Thailand is on track to become the dominant digital presence in both traditional and AI-native search — a position that will be increasingly difficult for competitors to replicate as the domain authority gap widens