How long before SEO delivers results?

Technical improvements (speed, schema) often show in crawl behaviour within weeks. Structural ranking growth on competitive terms takes 3 to 6 months. AI visibility can move faster: AI crawlers sometimes pick up well-structured new content within days.

What is the most important point if I can only do one thing?

Rewriting your core pages answer-first (points 7 and 13). It improves classic snippets and AI citations at the same time, without any technical work.

Can I do this myself or should I outsource it?

Points 6 to 10 you can largely do yourself. The technical points and the AEO setup require development knowledge: with us those are standard in every website from the first delivery.

SEO checklist 2026: 15 points that decide your ranking and AI visibility

Good SEO in 2026 rests on three layers: technology (speed, crawlability, structured data), content (search intent, authority, freshness) and AEO (visibility in AI answers). This checklist covers all 15 points in order of impact. Anyone following only the classic tips misses the share of search traffic shifting to AI answers.

Technology: points 1 to 5, the foundation

1. Core Web Vitals in the green (LCP under 2.5s, INP under 200ms, CLS under 0.1): speed is a confirmed ranking factor and the number one reason to choose static or headless architecture. 2. Full crawlability: no content that only appears after JavaScript, a correct sitemap.xml and a robots.txt that does not block by accident. 3. HTTPS and security headers everywhere.

4. Structured data (schema.org) on every page: Organization, Service, FAQ, Article and BreadcrumbList, validated without errors. 5. With multiple languages: hreflang with x-default, per page, consistent in both directions. One missing return reference and search engines ignore the whole set.

Content: points 6 to 10, where rankings are really made

6. Write each page for one search intent, not one keyword. 7. Answer first: put the complete answer in the first paragraph, then elaborate. 8. Build demonstrable authority (E-E-A-T): a real author with background, sources, and consistent company data across the web.

9. Internal links with meaning: every important page reachable within three clicks, anchor texts that describe the topic. 10. Freshness: structurally update existing pages and show the modification date. Ten current pages beat a hundred outdated ones.

AEO: points 11 to 15, the part most checklists miss

11. Explicitly allow AI crawlers in robots.txt (GPTBot, ClaudeBot, PerplexityBot, Google-Extended). 12. Place an llms.txt on your root with your key pages and facts. 13. Structure content to be quotable: question as heading, compact factual answer below it.

14. Define your entities unambiguously: organisation, founder and services linked via @id in your structured data. 15. Monitor your AI visibility: check monthly whether ChatGPT, Perplexity and Google AI Overviews mention you for your core questions, and adjust your content accordingly.

· Maricio Jongma, Jongma Development