Technical SEO Guide 2026: Core Web Vitals, Schema, Indexing

Technical SEO in 2026 is not just meta tags and sitemaps — it is the engineering of how Google, Bing, Yandex, and AI engines (ChatGPT Search, Perplexity, Gemini) understand your site. This is the operating checklist.

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1. Core Web Vitals

Since 2024, INP replaced FID. 2026 thresholds:

Metric

Good

Needs work

Poor

|---|---|---|---|

LCP	≤ 2.5s	2.5-4.0s	> 4.0s
INP	≤ 200ms	200-500ms	> 500ms
CLS	≤ 0.1	0.1-0.25	> 0.25

Measure: CrUX, PageSpeed Insights, Lighthouse CI, Web Vitals JS → GA4.

2. Indexing

Watch GSC Page indexing + crawl stats. 80% of not-indexed URLs come from thin content, weak internal linking, or canonical misconfig.

3. Sitemap & robots

Fresh lastmod, single sitemap under 50k URLs, no mixing robots disallow with noindex, x-robots-tag for headers.

4. Schema coverage

Organization + WebSite + SearchAction, BreadcrumbList, Article/BlogPosting, Service + LocalBusiness, FAQPage, Product/Offer/AggregateRating. Validate with Rich Results Test.

5. Hreflang

Every variant points to every other, x-default required, canonicalized URLs, consistent ISO codes.

6. Crawl budget

For 10k+ URLs: control facet params, self-referencing canonical in pagination, minimize 4xx/3xx, feed orphan pages, analyze server logs.

7. Internal linking

Topic silos, breadcrumbs, contextual links, footer hubs, 3-click rule, 10+ internal links to key pages.

8. JS SEO & rendering

Prefer SSR/SSG. Next.js App Router → server components by default, client components only for interactivity.

9. Generative Engine Optimization (GEO)

Citation-friendly content (definitions, lists, tables), entity alignment to Wikidata/Wikipedia, structured data for AI citations, allow AI bots explicitly (GPTBot, ClaudeBot, PerplexityBot, Google-Extended).

10. Monitoring

Uptime (BetterStack), perf (Vercel Speed Insights, Lighthouse CI), SEO regression (Ahrefs/SEMrush), indexation (GSC API), alerting via Slack/Discord.

11. 12-point checklist

1. HTTPS enforced 2. www/non-www canonical 3. Sitemap + hreflang consistent 4. robots.txt minimal 5. CWV 90+ mobile 6. Schema coverage 7. Silo IA 8. Near-zero 404/redirect chains 9. Image optimization 10. Mobile-first 11. Zero structured-data errors 12. GSC + Bing + Yandex + IndexNow set up

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Our toolset

Screaming Frog, Sitebulb, OnCrawl, Ahrefs Site Audit, Lighthouse CI, WebPageTest, Schema Validator, Rich Results Test, Ahrefs/SEMrush/SISTRIX, Peec.ai for AI visibility.

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*Makrops runs technical SEO audits for enterprise sites, covering Core Web Vitals, schema, hreflang, and AI-search optimization. Contact us for a one-week mini audit.*