12 Core SEO·Search-Engine Concepts — sandbox · E-E-A-T · DA · CTR · AI Overview on One Page

TL;DR: A new domain sits in Google sandbox for 6–12 weeks, so search impressions stay near zero. If your site is aimed at Korean users, Naver is really the main channel — and looking at GSC alone can make you think the site has died. On top of that, AI Overview and zero-click search keep pushing CTR even lower. What I came away with after running this for a while is that SEO is roughly 80% time and only about 20% action.

About a month after migrating the domain (taystudio.github.io → taystudios.com), I opened GSC and saw 2 clicks and 777 impressions. Honestly, I looked at those numbers and assumed something was broken with the site, and it threw me off for a while. Then Cloudflare showed a steady ~55 visits a day, and once I registered Naver SearchAdvisor I found 26,000 impressions and 230 clicks over the month.

In the end, I'd just panicked after looking at one side of the data.

This post collects the 12 SEO concepts I actually bumped into over that month. I'll cover the traps new-domain operators most commonly fall into, along with the quirks specific to the Korean market.

The basic flow

Site → [Crawl] → [Index] → [Rank] → Search results

If any one of these stages stalls, traffic goes to zero. After our 5/9 migration there was almost no indexing until 5/22, and then it started in earnest from 5/22 — about 13 days in total. In my experience, a fresh domain is simply slow to get indexed in the first place.

1. Google Sandbox — the "probation" for new domains

This is Google's unofficial algorithm that keeps fresh domains in a kind of probation period. For roughly 6–12 weeks, pages do get indexed, but their movement up the rankings is held back.

Why does it exist?

Think of it as a guard against spam and MFA (Made For AdSense) sites that spin up new domains just to grab rankings. It's essentially a window of time for Google to answer the question: "Will this site still be alive in six weeks?"

Signals you'll see

• Indexing happens just fine ✅
• Impressions spike, then dip (ours: 5/14 peak → 5/24 near zero)
• Very low CTR
• Older sites outrank you on the same keywords

What to do

It really comes down to three things: time, maintaining content quality, and earning backlinks naturally. As far as I can tell, there's basically no external shortcut to cut the period short.

Google officially denies the sandbox exists, but it's widely observed in the SEO community. Our domain started on 5/9, so adding 6–12 weeks puts the auto-expiration somewhere around 6/20 ~ 7/30. Until then, I've found that just waiting is the right answer.

2. E-E-A-T — Google's four quality pillars

Experience · Expertise · Authoritativeness · Trustworthiness

This matters especially for YMYL (Your Money, Your Life) content — taxes, medical, legal, finance — which Google evaluates very strictly. A single wrong number can be enough to drag down the trust score of the whole site.

More than half of our 38 calculators are YMYL (salary · property-tax · inheritance, etc.), so I made it a rule that every number is sourced directly from the government's official sites (law.go.kr, NTS, MOEF). Not a single blog or news outlet is cited. The idea was to shut down the E-E-A-T risk from the start.

3. Domain Authority (DA)

This is a 0–100 score for how much search engines trust a site. It's measured by the likes of Moz and Ahrefs — it's not an official Google score, just an estimate.

The factor that really decides it is backlinks: the quantity and quality of other sites linking to you.

• DA 70+ → Google ranks you high
• DA 0~10 → back of the results
• DA grows only with time + naturally accumulated backlinks

A new domain like ours has a DA close to zero. I suspect some authority carried over from the old taystudio.github.io, but either way it's something that needs 3–6 months to build up.

4. AI Overview — Google's new threat

Since 2024, Google has been showing AI answers directly at the top of search results.

Query: "net salary on 50 million KRW"
↓
AI Overview: "About 3.54M per month, after the 4 social insurances..."
↓
The user never clicks our site

For a calculator site like ours, that's a direct hit. Naver's Korean-policy AI is still fairly weak, so at least there the impact is minor.

5. Zero-Click Search

This is when users search but never click through — they get the answer from the search results page itself.

• Featured Snippet
• Knowledge Panel
• AI Overview
• "60%+ of Google searches are now zero-click" (Similarweb 2024)

The way to counter it is differentiated content that goes beyond a simple fact: simulations, matrices, case studies, visualizations — depth that AI can't condense into a single line.

That's exactly why we attached matrices to our tools (1-home-owner FMV ratio 9×4 / DSR back-calculation / 6+6 split scenarios).

6. The Korean search market

Korean queries — taxes, calculators, policy — lean heavily toward Naver. So judging a site by Google alone is a mistake here, and that's the thing I felt most acutely over a month of running it.

7. Sitemap · robots.txt · llms.txt — the contracts with crawlers

These days the standard is to explicitly Allow GPTBot · ClaudeBot · PerplexityBot · Google-Extended in robots.txt, and that's how I have it set up.

8. Schema.org / JSON-LD — the rich-snippet engine

This is a structured-data vocabulary that search engines understand, and JSON-LD is the most common format for it.

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [{
    "@type": "Question",
    "name": "What's the net salary on KRW 50M?",
    "acceptedAnswer": { "@type": "Answer", "text": "About 3.54M per month..." }
  }]
}
</script>

Drop this in and Google starts showing ⭐ ratings, expandable FAQs, and breadcrumbs in the results, which in turn lifts CTR.

9. CTR Optimization — turning impressions into clicks

Showing up doesn't help if no one clicks. The things that drive CTR are these:

• <title> — direct match with the query, and attractive
• <meta name="description"> — core value in ~150 chars
• URL readability — /tools/salary/ > /p?id=12345
• Rich snippets — ⭐, FAQ expand
• Site credibility (HTTPS, domain age)

For us, the combination of a new domain and AI Overview pressure left GSC CTR at 0.3% (normal is 2–5%). On the exact same site, Naver showed 0.9% — a 3× difference. It's a number that confirmed Korean engines match Korean content better.

10. Keywords — short-tail vs long-tail

New sites simply can't win short-tail. The path forward is patiently accumulating long-tails, and the matrices and simulations we keep adding are exactly that long-tail capture strategy.

11. Three analytics tools — looking at one is missing the big picture

Combining all three, the picture came out like this:

• GSC (3 months): 2 clicks / 777 impressions
• Naver (30 days): 230 clicks / 26,000 impressions
• Cloudflare (24h): 57 visits

Naver turned out to be 33–115× GSC. If I'd only looked at Google, I might well have written the site off.

12. GEO (Generative Engine Optimization) — SEO for the AI era

This is about optimizing so that ChatGPT · Claude · Perplexity · Gemini cite your site when they answer.

• llms.txt — markdown meta at site root
• Structured data (Schema.org)
• Source citations (author · date · source)
• Fact-rich content

Cloudflare already shows chatgpt.com as a referrer, which means LLM exposure has already begun. I expect updating llms.txt to speed that up.

Wrap-up — SEO is 80% time, 20% action

The things an operator can actually do are about this much: - Set up sitemap · robots · llms.txt - Register on every engine (GSC · Naver · Daum · Bing) - Optimize title/description for CTR - Add structured data - Differentiate content

And the things you can't: - Shorten Google sandbox - Boost DA instantly - Soften AI Overview - Change Naver's algorithm

One month into running a new domain, my conclusion is this: don't panic over a single data source. Even with Google weak, Naver + Daum + AI channels add up to plenty of traffic. Our own site had 57 visits a day, 230 Naver clicks a month, and AI-search exposure just starting — far from dead.

Related

• (Coming) GSC vs Naver vs Cloudflare — same site, three different stories
• (Coming) Adding llms.txt — site metadata for the AI-search era