How Many SEO Articles Does a Website Need? Estimated Formula & 90 Day Roadmap

“How many SEO articles does a website need?” – The question seems simple, but if answered with a fixed number, it is almost... wrong. The problem is not in quantity, but in strategy: covering search needs, building topical authority, and surpassing competitors on Google.

Core thinking: Count “topics” before counting “articles”

A standard content plan does not rely on emotions. It goes from:

• Business goals & SEO KPIs (identification, non-brand traffic, leads/booking).

• Search behavior in each stage (knowing → considering → deciding).

• Topical Map: the topic map serves as the backbone for the whole thing. site.

Early conclusion: There is no “standard” number for every website. The right number is the number that covers enough topics to make you competitive in your industry.

How to determine the amount of Content needed (3-step framework)

Step 1 — Determine goals & scope business

• Do you need identification, organic traffic or conversion?

• B2C or B2B? National or local (e.g. Ho Chi Minh)?

• How many core product/service categories are there?
  The result of this step is a list of pillar (large service/category pages) + conversion pages (quotation, case study, testimonial, FAQ, contact…).

Step 2 — Research Research & group keywords → get "number of topics"

Suppose you collect 1,000 keywords, group them down to 250 groups (each group = 1 clear search intent) → at least 250 pages/articles to cover that group (pillar/landing/blog, depending on intent).
Suggestions for dividing type:

• Main keyword (pillar): represents each service/category.

• Product keyword (e-commerce): details for each SKU/variant (depending on industry, can be combined).

• Sub-topic keywords (blog/how-to/case study): most non-brand traffic, built E-E-A-T.

Step 3 — Compare competitors & update Topical Map

• Choose 1–2 really strong competitors on the entire keyword set (don't just look at a few head queries).

• Use tools (Ahrefs, Semrush; in Vietnam, I rate Sona Tools well for ratio mapping). cover top) to:

  • Get a list of URLs that are bringing in a lot of traffic.

  • Compare to your plan → reveal content gap (missing/excess topic, intent not yet covered).

Tip: identify competitors based on % of keywords they are holding top in your entire list – not feeling or a few “key” keywords.

“Quick formula” to estimate the number of articles by site type

This is a reference frame to start with. The actual number depends on the industry, competition and topic depth.
1) Service businesses (B2B/B2C, local HCM)

• 1 Home page + 1 About + 1 Contact.

• Each core service: 1 Pillar Landing (BOFU) + 5–10 supporting articles (how-to, case, checklist, pricing insight…).

• Local SEO: if serving Ho Chi Minh and has multiple target districts, create regional landing (with real content, avoid duplication).

• Conversions: 1 Pricing, 2–3 Case Studies, 1–2 Testimonial/Review, 1 FAQ.

Example: 5 main services → 5 pillars + (5×6)=30 support articles + 6 conversion articles + 3 basic pages ≈ 44–50 URLs for a serious start.
2) E-commerce/Marketplace

• Category: 1 page/category (SEO optimized).

• Products: depending on industry. Fashion/accessories can be compact; electronics/industrial needs in-depth description (spec, comparison, tutorial).

• Blog: each category should have 3–8 articles tutorials/tips/comparisons to attract non-brand.
  3) Technical B2B Niche

• Low volume but high intention. Usually need 20–40 in-depth articles (whitepaper/case/solution comparison), quality > quantity.

Build Topical Map & Content Cluster (short, easy to do)

• Each pillar = 1 big topic (service/category).

• Each pillar has 5–12 article clusters answer sub-questions (how-to, checklists, mistakes, costs, tools, compare A vs B...).

• Internal link: from cluster → pillar and between related clusters.

• Schema & E-E-A-T: real author, contact information, reference sources, real photos, cases real.

Publishing & maintenance schedule (first 90 days → 12 months)

First 90 days

• Weeks 1–2: edit tech SEO (CWV, index, sitemap, schema).

• Weeks 2–6: publish entire pillar + interlink.

• Weeks 6–12: publish cluster (2–4 articles/week), build BOFU pages (pricing, cases, FAQ), optimize local landing.
  After 3–12 months

• Ratio 40/50/10: 40% update articles with impressions, 50% new additions according to content gap, 10% prune/merge weak content.

• Review Top 20 pages according to GA4/GSC every quarter to A/B test titles, CTAs, snippets.

Quality > quantity (threshold I recommend recommendation)

• Pillar/landing: 1,500–2,500 words, with comparison/price insight/case/FAQ.

• Cluster: 900–1,500 words, straight to the intent, with schema/FAQ.

• Local landing: “real” content for the area (eg for example: service time, real photos, local reviews).

• Avoid: duplication, word stuffing, “500 word article for nothing”.

Measure to know if there is “enough article”

• Coverage: % of keyword groups in the Top 10 (according to cluster).

• Engagement: time on page, scroll, outbound click, CTA.

• Business: leads/bookings from organic (non-brand), sales lead response rate.

• Signal: number of pages with impressions increases steadily, brand search increases according to campaign season.

When coverage lasts low, or many intents do not have a correct answer page - meaning not enough content.

There is no magic number for every website. Please: 1) Finalize your goals → 2) group keywords into topics → 3) compare your competitors to measure content gap. From there, you will have a baseline number instead of "plugging in content". If you want to shorten the trial-error curve, Tan Phat Digital (professional web design service in HCM, Ho Chi Minh Website Design) can support the entire process: research & build Topical Map, create 90-day content plan, publish/optimize according to GA4 + GSC, ensuring both ranking and suitability conversion case.