A technical SEO audit finds the structural problems on your website that prevent Google from crawling, indexing, and ranking your pages. Most US websites have at least three to five significant technical issues. Fixing them does not guarantee rankings — but leaving them unfixed guarantees you will not reach your potential in organic search.
This checklist covers every area of technical SEO that matters in 2026. Work through it in order.
1. Crawlability and indexing
Google can only rank pages it has found and indexed. Crawlability problems are the most fundamental technical SEO issues.
Check your robots.txt. Visit yourdomain.com/robots.txt. Confirm it is not blocking important pages from being crawled. A misconfigured robots.txt can accidentally prevent Google from accessing your entire site.
Submit your sitemap to Google Search Console. Go to Search Console → Sitemaps → submit your XML sitemap URL. Confirm no errors or warnings.
Check indexing status. Search Console → Pages → Not indexed tab. Common causes: noindex tags, crawl errors, duplicate content, soft 404s.
Use site:yourdomain.com in Google. If the result count is significantly lower than your total page count, you have an indexing problem.
Check for crawl errors. Search Console → Settings → Crawl Stats. A spike in errors or sudden drop in crawl rate often precedes ranking losses.
Verify canonical tags. Every page should have a canonical tag pointing to the preferred URL version. Critical for US e-commerce sites that generate multiple URLs for the same product (size, colour, and sort order parameters).
2. Site architecture and URL structure
Clean, descriptive URLs. /services/digital-marketing outperforms /page?id=47 for both users and search engines.
Check for orphan pages. Pages with no internal links pointing to them may never be found by Google. Use Screaming Frog or Ahrefs Site Audit to identify them.
Review internal link distribution. High-value pages — service pages, money pages, pillar content — should receive more internal links than supporting pages.
Resolve redirect chains. Page A → Page B → Page C should become Page A → Page C directly. Chains lose link equity and slow page loads.
Verify HTTPS. Every US website should be fully served over HTTPS. Mixed content warnings (HTTP resources on HTTPS pages) are flagged in Chrome and affect user trust.
Eliminate duplicate URL versions. One canonical version of each URL should be accessible. Redirect all alternatives (WWW/non-WWW, HTTP/HTTPS, trailing slash variants) to the canonical.
3. Core Web Vitals
Core Web Vitals are Google’s user experience signals and a confirmed ranking factor.
Largest Contentful Paint (LCP) — time for the largest visible element to load. Target: under 2.5 seconds. Main causes of failure: unoptimised images, slow server response, render-blocking resources.
Interaction to Next Paint (INP) — page responsiveness on interaction. Target: under 200ms. Caused by heavy JavaScript on the main thread.
Cumulative Layout Shift (CLS) — visual stability as the page loads. Target: under 0.1. Caused by images without defined dimensions, late-loading fonts, and dynamically injected content.
Check your data. Google Search Console → Core Web Vitals (field data for your real users). PageSpeed Insights (pagespeed.web.dev) for lab data per page.
Fix images first. Every image should have explicit width/height attributes, be in WebP format, and use loading="lazy" for below-the-fold images. This alone resolves the majority of LCP and CLS issues.
4. Structured data
Structured data enables rich results — FAQ dropdowns, review stars, article bylines, event listings — which increase click-through rates from search results.
Check current schema. Use Google’s Rich Results Test to see what Google detects on your pages.
Priority schema for US businesses:
- Organization — name, logo, contact details, social profiles
- LocalBusiness — address, hours, service area (critical for local SEO in the US)
- FAQPage — expandable FAQ answers in search results (significant CTR improvement)
- Article / BlogPosting — for content marketing
- Product + Offer — required for Google Shopping free listings (US e-commerce)
- Review / AggregateRating — star ratings in results (major CTR driver)
- BreadcrumbList — page hierarchy in search results
- HowTo — step-by-step guides (eligible for rich results in US SERPs)
Validate all schema. Use the Rich Results Test before publishing. Invalid schema produces no rich results and generates Search Console warnings.
5. Page speed
Compress and convert images to WebP. WebP is 25–35% smaller than JPEG at equivalent quality. Required for competitive page speed.
Enable browser caching. Long cache expiry on static assets (CSS, JS, images, fonts) speeds up returning visits significantly.
Minimise render-blocking resources. Inline critical CSS, defer non-critical JavaScript. Use Chrome Coverage tool to identify unused CSS and JavaScript.
Use a CDN. For US businesses serving a national audience, a CDN (Cloudflare, Fastly, AWS CloudFront) significantly reduces load times across different geographic regions.
Check TTFB. Time to First Byte under 200ms. Slow TTFB points to slow hosting or database queries. Upgrade your hosting or implement server-side caching if TTFB exceeds 500ms.
6. Mobile optimisation
Google uses mobile-first indexing for all websites. Rankings are determined based on the mobile version of your site.
Run the Mobile Usability report. Search Console → Mobile Usability. Fix any flagged issues.
Tap target sizes. Buttons and links need 48×48px minimum. Smaller targets produce high bounce rates on mobile.
Font size. Body text at 16px minimum on mobile. Anything smaller triggers a “text too small to read” warning in Search Console.
Test on real devices. Test on both iOS and Android. Chrome DevTools emulation does not catch all real-device rendering issues.
7. Local SEO signals (US-specific)
For US businesses with physical locations or service areas:
Google Business Profile. Claim and fully complete your Google Business Profile. Name, address, phone, hours, categories, photos, and services. This is the single highest-impact action for local rankings.
NAP consistency. Name, Address, Phone must be identical across your website, Google Business Profile, and all directory listings (Yelp, Yellow Pages, BBB, industry directories). Inconsistency confuses Google about which information is authoritative.
LocalBusiness schema. Implement LocalBusiness schema on your Contact or About page with full address, phone, and service area.
Local citations. Ensure your business is listed accurately on the major US directories: Yelp, BBB, Bing Places, Apple Maps, and industry-specific directories relevant to your sector.
8. Content quality signals
Check for thin content. Pages with fewer than 300 words or that duplicate other pages dilute site quality. Consolidate or expand them.
Unique title tags and meta descriptions. Every page needs a unique title (50–60 characters) and description (150–155 characters). Duplicate titles trigger Google rewrites.
Heading hierarchy. One H1 per page containing the primary keyword. H2s and H3s should structure content logically, not be used for styling.
Verify no duplicate content. Use Siteliner or Ahrefs Site Audit to find internally duplicate content.
Prioritisation order
Fix in this order for maximum impact:
- Indexing issues
- Core Web Vitals failures (especially LCP)
- Schema markup gaps
- Duplicate content and canonicalisation
- Page speed optimisation
- Local SEO signals (if applicable)
Run this audit quarterly. Technical debt accumulates as sites grow.
Need a technical SEO audit for your US website? Contact Carril Agency — we work with businesses across the US, UAE, and Mauritius.
FAQ
How long does a technical SEO audit take for a US business website?
For a site under 500 pages, thorough analysis takes 2–4 hours plus documentation time. For larger enterprise sites, allow 1–3 days. Automated tools speed up data collection significantly.
What is the best free tool for a technical SEO audit?
Google Search Console is the most important free tool — it shows indexing issues, Core Web Vitals data, mobile usability problems, and hreflang errors directly from Google’s perspective. Google PageSpeed Insights provides per-page performance data. Both are essential.
How does Core Web Vitals affect US Google rankings?
Core Web Vitals is a confirmed ranking signal in Google’s Page Experience update. For competitive queries where content quality is similar across the top results, Core Web Vitals can be the differentiating factor. For queries with clear content quality differences, it is less determinative.
What is the most commonly missed technical SEO issue for US websites?
Duplicate URL variations are the most commonly missed. Many US websites are accessible at both www.domain.com and domain.com, via both HTTP and HTTPS, and with and without trailing slashes — creating eight potential URL versions for every page. Only one should work; the others should 301 redirect to the canonical.
How often should I audit my site’s technical SEO?
Quarterly for most sites. After any redesign, platform migration, or significant content restructure. After an unexplained traffic drop — technical issues are frequently the cause.
Should I hire an agency or do my own technical SEO audit?
For simple sites, a founder or marketing manager can run a meaningful audit using Google Search Console and PageSpeed Insights. For complex sites, sites with significant technical debt, or situations where you have already made fixes and are not seeing improvement, professional audit services provide faster diagnosis and more comprehensive findings.