Vercel SEO Audit

What DeepSEOAnalysis checks for Vercel

Frequently asked questions

How does deploying on Vercel affect SEO performance and Core Web Vitals?

Deploying on Vercel improves the baseline SEO performance of Next.js sites through several mechanisms: automatic image optimisation via the Next.js Image component (WebP/AVIF conversion, responsive srcset, lazy loading), edge caching of static and ISR pages at Vercel\'s CDN layer, and built-in compression. However, Vercel deployment does not guarantee good Core Web Vitals scores — LCP, INP, and CLS are determined by how you build your pages (render strategy, image handling, font loading, JavaScript bundle size), not just where they are hosted. A poorly optimised Next.js app will have poor CrUX scores on Vercel just as it would on any other host. DeepSEOAnalysis measures the CrUX p75 field data from real Chrome users for your Vercel-hosted domain — the actual Google Page Experience signal — rather than synthetic lab scores, so you see whether your real traffic meets Google\'s Good thresholds.

Does Vercel\'s edge network improve Core Web Vitals scores?

Vercel\'s edge network (Vercel Edge Network, backed by Cloudflare and AWS CloudFront) reduces TTFB (Time to First Byte) by serving cached responses from a point of presence close to the user. Lower TTFB contributes to faster LCP because the browser receives the HTML containing the LCP element earlier. For statically generated (SSG) and ISR pages — which Vercel caches at the edge — TTFB improvements are most pronounced. For server-side rendered (SSR) pages that bypass the cache on every request, TTFB depends on your serverless function cold start time and origin database latency. INP (Interaction to Next Paint) is not meaningfully affected by the edge network — it depends on main thread JavaScript execution on the client. CLS is entirely client-side. DeepSEOAnalysis reports CrUX p75 LCP, INP, and CLS from real Chrome users, which reflects the combined effect of your Vercel deployment configuration, render strategy, and client-side code.

What structured data should SaaS companies hosted on Vercel add?

SaaS companies on Vercel should implement structured data targeting the content types Google most frequently uses for rich results. On the homepage: Organization schema with name, url, logo, sameAs (Twitter/X, LinkedIn, GitHub), and contactPoint. On the pricing page: SoftwareApplication schema with applicationCategory, offers (with price and priceCurrency for each tier), and operatingSystem. On blog posts: Article schema with headline, author (Person with name and url), datePublished, dateModified, and image. On documentation or help pages: FAQPage schema for any sections structured as questions and answers, and HowTo schema for step-by-step guides. On case study or testimonial pages: Review schema with reviewRating and author. DeepSEOAnalysis validates all JSON-LD on your Vercel-hosted pages against Google\'s structured data specifications, checks for required properties, and assesses rich result eligibility — so you can identify which schema implementations are complete and which are missing fields that prevent rich results from appearing.

How do Vercel Analytics and Speed Insights compare to CrUX data?

Vercel Analytics collects first-party Web Vitals data from real users of your site using the @vercel/analytics package — it reports LCP, FID/INP, CLS, FCP, and TTFB from your actual visitor sessions. Vercel Speed Insights provides a subset of this data with a visual dashboard in the Vercel UI. CrUX (Chrome User Experience Report) is Google\'s own dataset of field performance data from Chrome users who have opted in to usage statistics sharing. The key difference for SEO: Google uses CrUX data as the Page Experience ranking signal, not Vercel Analytics data. CrUX requires a 28-day data collection window and a minimum traffic threshold before a URL appears in the dataset. Vercel Analytics shows you real user performance from day one (including from non-Chrome browsers) but is not what Google\'s ranking algorithm reads. DeepSEOAnalysis queries the CrUX API directly — the same data Google uses — so you know whether your pages are above or below Good thresholds in the ranking signal itself, not just in your first-party analytics.

What are the SEO implications of Next.js ISR, SSR, and SSG on Vercel?

The Next.js render strategy you choose on Vercel has direct SEO implications. Static Site Generation (SSG) produces fully pre-rendered HTML at build time — Googlebot receives complete page content on first fetch, CrUX LCP is typically lowest, and pages are served from the Vercel edge cache for fast TTFB. Incremental Static Regeneration (ISR) is similar to SSG at request time — the first request after a revalidation window triggers a background rebuild, but users always receive a cached page. ISR is the standard choice for content that changes but does not need real-time freshness. Server-Side Rendering (SSR) generates HTML on every request in a Vercel serverless function — Googlebot receives complete HTML (good for crawlability) but TTFB depends on function cold start and database latency, which can hurt LCP for dynamically rendered pages. Client-Side Rendering (CSR) — where content is fetched by JavaScript after load — creates crawlability risk: Googlebot must execute JavaScript to see the content, which delays indexation and may miss dynamically inserted structured data. DeepSEOAnalysis detects render strategy signals from your page HTML and flags CSR patterns that may affect Googlebot\'s ability to index your content.

How does Vercel\'s deployment preview URL affect canonical and indexation?

Every Vercel deployment generates a unique preview URL (e.g., your-project-abc123.vercel.app) in addition to your production domain. These preview URLs are publicly accessible by default, which creates a duplicate content risk: Googlebot can crawl and index the preview URL as a separate page from your production canonical. The correct configuration is to set X-Robots-Tag: noindex on all preview deployments, or to restrict preview URL access with Vercel\'s deployment protection (password or Vercel authentication), and to ensure your canonical meta tag on every page points to the production domain (e.g., https://yourdomain.com/page, not the vercel.app URL). In Next.js App Router, set the canonical in generateMetadata() using alternates.canonical. For branch preview deployments, Vercel\'s protection bypass headers should be used during QA rather than leaving previews publicly accessible. DeepSEOAnalysis checks the canonical tag on your production pages and flags vercel.app self-canonicals, missing canonical tags, and pages where the canonical does not match the production domain.