Google Core Update: What Singapore SMEs Should Do Now

Most SMEs only notice a Google core update after leads drop.

Google’s March 2026 Core Update is rolling out right now (Google says it can take up to two weeks). At the same time, Google is getting unusually transparent about two things that directly affect your visibility: how rankings change in waves, and how Googlebot can stop reading your page after 2 MB and index only what it managed to fetch.

If you’re running an SME in Singapore, this isn’t “SEO theory.” It’s operational. A core update can reorder your top landing pages, a crawl limit can quietly cut off your product or service content, and new AI referral traffic (notably Gemini) is becoming large enough to show up in analytics—still small overall, but growing fast.

This post is part of our “AI Business Tools Singapore” series, where we focus on practical, revenue-linked moves. Here’s what I’d do this week if I owned a local service business, ecommerce brand, or B2B company relying on organic traffic.

The March 2026 Core Update: expect waves, not one big hit

A March core update doesn’t “finish” in one moment. It typically lands in stages, which is why rankings often swing, calm down, then swing again.

Google’s messaging is consistent: core updates are meant to surface more relevant, satisfying content across many types of sites. For SMEs, the real takeaway is that you shouldn’t overreact to daily volatility during rollout—yet you also can’t ignore patterns once they stabilize.

What to watch in Google Search Console (and what not to)

Google’s own guidance is to wait at least a full week after the rollout completes before doing a serious performance read. That’s good advice, but SMEs still need a “during-rollout” dashboard so you’re not flying blind.

Here’s a simple monitoring setup that works:

• Daily (5 minutes): check Search Console’s performance trend for Clicks and Impressions.
• Twice weekly (15 minutes): review your top 10 pages by clicks and note any sharp drops.
• During the rollout: avoid rewriting whole sections of your site based on one bad day.

What not to do: panic-editing titles, deleting content, or changing internal links sitewide because a keyword slipped from position 3 to 8. That often creates a second problem right when Google is recalibrating.

A practical Singapore SME baseline for comparison

If you want a clean comparison, set a baseline period before March 27 (the SEJ piece references that as a key cutoff for comparing performance). For local businesses, I’ve found it useful to segment by intent:

• High-intent pages: “pricing,” “book appointment,” “contact,” “service + location”
• Mid-intent pages: “best [service],” “compare,” “reviews,” “case studies”
• Top-of-funnel pages: guides, FAQs, educational blog posts

If your high-intent pages drop while top-of-funnel stays flat, it’s often a relevance or trust issue (content quality, page experience, thin service details). If everything drops together, it can be a broader reassessment or a technical issue.

Core update myth: “Google penalised my site”

Most ranking losses aren’t penalties. They’re re-ordering.

A core update is basically Google saying, “We got better at deciding what deserves page one.” Your job is to make your pages the most complete answer for a query—especially in Singapore, where search results are crowded with aggregators, marketplaces, and big directories.

Googlebot’s 2 MB crawl limit: the silent killer of “big pages”

Google’s Gary Illyes clarified an important detail: when Googlebot hits the 2 MB fetch limit, it doesn’t reject your page. It simply stops fetching, then indexes the truncated content as if it were the full page.

That means:

• Anything after the 2 MB cutoff is effectively invisible to Google’s index.
• Your page may look perfect to users, but Google may only “see” the first part.

This matters more than many SMEs realise because modern pages get heavy fast—especially on WordPress, Shopify, and page builders with lots of scripts and inline assets.

What counts toward the 2 MB limit (and the common mistakes)

According to the update, HTTP request headers count toward the 2 MB limit. Also, external resources like CSS and JavaScript get their own separate byte counters, which is helpful—but it doesn’t save you if your HTML response itself is bloated.

The most common SME causes of oversized HTML:

• Inline base64 images embedded directly into the HTML
• Massive inline CSS/JS (often from page builders or tracking scripts)
• Overgrown navigation and footer components repeated across pages
• Excessively long pages that keep appending FAQs, testimonials, maps, and widgets

If your money page is long, don’t assume “longer is better.” Long is fine. Bloated is not.

A quick way to check if your key pages risk truncation

You don’t need an enterprise tool to do a first-pass check.

1. Open a key page (service page, category page, high-traffic blog post).
2. Use your browser’s dev tools or an SEO extension to check document size.
3. If it’s anywhere near 2 MB for the raw HTML, treat it as a red flag.

If you want a more definitive check, your developer can run a curl -I and curl fetch to estimate header + HTML size from the server response and see whether the HTML is unusually large.

Fixes that don’t wreck your design

Most SMEs hesitate here because they fear breaking the site. The reality: you can reduce HTML weight without changing the layout.

Start with these high-impact moves:

• Remove inline base64 images; serve images as files and compress them.
• Replace large repeated blocks (like multi-location lists) with collapsed components that don’t render huge chunks of HTML on initial load.
• Audit plugins and tags; many page builders inject heavy inline code.
• Keep structured data tight—include what’s useful for eligibility, not everything you can think of.

Google also noted the broader crawling platform default is 15 MB, and Googlebot for Search uses a 2 MB override. Translation: other Google crawlers might fetch more, but the one that determines Search indexing is stricter.

Page size is trending up—and Singapore sites aren’t immune

Google’s own podcast discussion highlighted that web pages have grown nearly 3x over the past decade. The 2025 Web Almanac cited in the RSS content reports a median mobile homepage size of 2,362 KB.

That number is uncomfortably close to the 2 MB conversation, and here’s the nuance: the Almanac figure is a page weight metric that can include many resources, while Google’s 2 MB limit is specifically about the fetched bytes for a response. Still, it’s a useful signal—pages are fat, and it’s easy to overdo it.

Opinion: structured data bloat is real (but still worth it)

Illyes raised a fair question: is structured data contributing to page bloat?

I think the right stance for SMEs is:

• Yes, schema can add weight, especially if you paste giant JSON-LD blocks everywhere.
• No, that doesn’t mean you should remove it. In a market like Singapore, rich results can improve click-through rate and trust.

The smarter play is to:

• Keep JSON-LD minimal and accurate
• Use schema where it maps to a real SERP feature (e.g., FAQ, Product, LocalBusiness)
• Avoid duplicating the same massive markup across dozens of pages

Gemini traffic doubled: why SMEs should track AI referrals now

SE Ranking’s analysis (based on 101,000+ sites with GA installed) found that Gemini referral traffic increased 115% between Nov 2025 and Jan 2026, and in January it sent 29% more referral traffic than Perplexity globally.

Two numbers matter for planning:

• ChatGPT still drives ~80% of AI referral traffic.
• All AI platforms combined are still only about 0.24% of global internet traffic (up from 0.15% in 2025).

So no, AI referrals aren’t replacing SEO tomorrow. But they’re now large enough that a Singapore SME should measure them—especially if you sell higher-consideration services (renovation, tuition, corporate services, clinics) where buyers research broadly.

What to do in GA4 this week

Set up a simple AI referral view so you can answer a basic business question: Are AI assistants sending me traffic that converts?

Checklist:

• In GA4, create an exploration for Session source / medium.
• Filter for sources that include: chatgpt, perplexity, gemini, bard (legacy), and any emerging domains you spot.
• Compare:
  • Engagement rate
  • Key events (lead form submit, WhatsApp click, booking)
  • Assisted conversions (if you’re tracking them)

If AI traffic is tiny today, that’s fine. The goal is to build a baseline so you can spot meaningful movement later.

How to “earn” AI referrals (without chasing shiny objects)

AI tools tend to cite or recommend brands that are easy to understand and verify.

For SMEs, that usually comes down to:

• Clear service definitions: one page per service, with scope, pricing range, timeline, and what’s included.
• Proof: case studies, before/after, credentials, and review signals.
• Consistent entity info: business name, address, phone, and operating hours match across your site and listings.
• Answer-first content blocks: short, direct answers near the top, followed by details.

If you’re already doing good SEO, you’re not starting from zero. You’re just formatting and structuring content in a way machines can confidently reuse.

A 14-day action plan for Singapore SMEs (built for leads)

This core update window is a good forcing function. Here’s a two-week plan that’s realistic for a small team.

Days 1–3: stabilise measurement

• Mark the date range in Search Console notes (or internal docs) for the rollout period.
• Create your baseline comparison window (pre–Mar 27).
• Pull a list of:
  1. Top 20 landing pages (organic)
  2. Top 20 queries
  3. Pages with the biggest click drops week-over-week

Days 4–7: fix crawl-and-index risks

• Check your top 10 money pages for heavy HTML and bloated templates.
• Remove inline base64 images and obvious dead scripts.
• If you run a large catalogue (ecommerce), audit faceted navigation and parameter pages so Google isn’t wasting crawl budget on duplicates.

Days 8–14: upgrade content where it matters

• For pages that dropped, tighten the “above the fold” section:
  • One-sentence value proposition
  • 3–5 bullet points of what the customer gets
  • Strong trust markers (years, certifications, guarantees, real photos)
• Add a short FAQ section that addresses real objections (not generic questions).
• Improve internal linking from high-traffic guides to the service pages that generate leads.

A blunt but useful rule: don’t rewrite everything. Fix the pages that (1) drive revenue and (2) are clearly losing ground.

What this week’s theme signals: Google is explaining, but SMEs still need a playbook

Search Engine Journal’s “theme of the week” is spot-on: Google is explaining more of its systems—core updates roll out in waves, Googlebot operates inside a larger crawling platform, and byte limits can truncate what gets indexed.

For Singapore SMEs, that transparency is only valuable if you turn it into process: monitor calmly during rollout, remove crawl-limit risks from your most important pages, and start tracking AI referrals like Gemini so you’re not guessing later.

If your organic leads dip in April, the question to ask isn’t “What trick fixes this?” It’s: “Did Google stop trusting my page as the most satisfying answer—and did Googlebot even see the whole thing?”