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Case Study: Diagnosing SEO/GEO for AGS Advance Global Study | Ktdigital – Aiden Hoang Nguyen

Case Study · SEO/GEO Audit August 13, 2026 7 min read AH Aiden Hoang Nguyen

AGS Advance Global Study — a Vietnamese-Australian study abroad and migration consultancy — entered mid-2026 with traffic down roughly 60% over 16 months, and the most common instinct in this situation is to start writing new content immediately. I did the opposite: I audited the full 16 months of Search Console data first, to answer a single question — where exactly is the site breaking — before recommending a single new page or article.

Project Snapshot
Client
AGS Advance Global Study
Industry
Study Abroad & Migration Consulting (Vietnam–Australia)
Role
SEO & GEO Consultant — Search Diagnostics & Topical Architecture
Duration
08/2026 — audit complete, execution phase awaiting priority sign-off
Services
Technical SEO Audit, GSC Diagnostics, Topical Cluster Planning, GEO/E-E-A-T
Website
16 months
Of GSC data fully audited
3 P0 issues
Root causes flagged before any fix
2 experts
E-E-A-T bios ready to deploy

The Challenge

Impressions for ags-study.com peaked at 38,072/month in August 2025, then fell steadily to around 15,000–16,000/month — a drop of nearly 60% over 16 months. Index Coverage also dropped from 420 to 367 crawled pages in a single month (June 2026 → July 2026, -13%). Most notably: the brand keyword "ags" ranks at an average position of 6.84 with 11,716 impressions, but CTR is just 0.62% — an unusually low number for a branded query, where CTR is normally far higher.

The core conversion pages are underperforming just as badly: /visa-du-hoc/ (study visa) has only 13 clicks at an average position of 45.93; /dinh-cu-uc/ (Australia migration) is nearly invisible with 45 impressions across the full 16 months; and /tu-van-du-hoc/ (study consulting) — the main hub of the consulting cluster — has only 1,014 impressions. Meanwhile, the site's strongest blog post (832 clicks) doesn't link to any of these conversion pages at all.

Industry Fact
At Google I/O, Google announced that AI Overviews now serve more than 1 billion users per month across 100+ countries. For study-abroad and migration queries — most of which are "how-to" questions about visa requirements, processing time, and cost — the share of SERPs showing an AI Overview tends to run above average, meaning traditional ranking optimization alone is no longer enough to hold onto traffic.
Source: Google I/O 2024

The Approach

After a 16-month decline, writing new content before understanding the root cause is the surest way to burn budget without reversing the trend. I applied a root-cause-first principle — already validated on sibling projects in the same ecosystem (dkentertainment.vn, vudoan.vn): diagnose first, prioritize by P0/P1/P2, then propose execution.

1. Diagnose before prescribing

The full 16 months of GSC data were pulled and cross-referenced by month, by page, and by query — instead of relying on aggregate numbers that can hide the real trend.

2. Prioritize by severity, not by convenience

Every finding was sorted into P0 (investigate root cause), P1 (strengthen conversion pages), or P2 (expand new Topic Clusters) — and nothing moved into execution until the priority order was confirmed.

3. Prepare the E-E-A-T foundation before writing content

Full bios for the two consulting experts (professional registration, years of experience) were standardized ahead of time, ready to attach to every core visa/migration page as soon as new content is written — avoiding a second pass to retrofit E-E-A-T later.

Execution Breakdown

The audit followed this sequence, with every step confirmed against real data instead of assumption:

  1. Cross-referenced 16 months of GSC + Index Coverage: confirmed the decline started around September 2025, alongside index bloat (420 → 367 crawled pages).
  2. Investigated the brand keyword CTR anomaly: manually checked the SERP for "ags" to rule out a competing brand with the same name.
  3. Audited the 3 core service pages: /visa-du-hoc/, /dinh-cu-uc/, /tu-van-du-hoc/ — cross-checking position, impressions, and internal links from the site's top-performing blog posts.
  4. Reviewed the province/city page cluster: flagged a possible doorway-page pattern similar to what was found at dkentertainment.vn/vudoan.vn — marked for a full content audit before drawing conclusions.
  5. Built a priority Topic Cluster list: "study [country] consultants" by destination, plus visa subclasses the site is losing entirely (462, 190, 189) — high search demand where the site barely ranks.

The Results

The audit phase was completed on August 12, 2026. The result isn't a traffic number that's already gone up — it's a clear map of root causes and a ready-to-execute priority list, instead of guesswork:

  • 3 P0 root causes identified for investigation before touching any page (index coverage, brand keyword CTR, the exact point the decline started).
  • 3 core conversion pages confirmed as underperforming and flagged for reinforcement as soon as the P0 items are resolved.
  • E-E-A-T bios for 2 consulting experts standardized and ready to attach to new content without re-collecting information.

The execution phase is awaiting Aiden's sign-off on priority order before any page gets touched or new content gets written — the same root-cause-first principle applied throughout this project.

When traffic drops 60% over 16 months, the first instinct is always to write more content. But if you don't know exactly what's broken, new content just pours more budget into a system that's already failing.
Aiden Hoang Nguyen · Senior Marketing Manager, Ktdigital
Tools & Stack
Google Search Console GSC Coverage Report Claude ChatGPT Google Sheets
Free SEO/GEO Audit

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