What is an SEO assessment?
An SEO assessment (also called an SEO audit or SEO health check) is a systematic review of your website that identifies everything preventing it from ranking on Google. It examines your site from the perspective of search engine crawlers and scores your performance across every major ranking factor.
Unlike guesswork or one-off fixes, an SEO assessment gives you a complete picture: what is working, what is broken, and what to prioritise. Most website owners are surprised to find that the issues hurting their ranking are not the ones they expected.
A proper website SEO assessment covers technical SEO, on-page optimisation, page speed, structured data, link health, and — increasingly — visibility in AI search engines like ChatGPT and Perplexity.
How is an SEO assessment different from Google Search Console?
What a complete website SEO assessment covers
A thorough SEO assessment is broken into categories. Each category affects your ranking in a different way. Here is what each one means and why it matters.
Technical SEO
The foundation of your site's crawlability. Checks HTTPS/SSL status, robots.txt configuration, XML sitemap validity, canonical tags, hreflang, pagination, and crawl errors. If Google cannot crawl your site correctly, nothing else matters.
On-Page Optimisation
Title tags, meta descriptions, heading hierarchy (H1–H6), keyword usage, content length, internal linking structure, and image alt text. On-page issues are the most common and the easiest to fix.
Page Speed & Core Web Vitals
Google uses Core Web Vitals as a direct ranking factor. This covers LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), INP (Interaction to Next Paint), and overall PageSpeed scores for both desktop and mobile.
Link Health
Internal links pointing to 404 pages, external broken links, redirect chains, and orphaned pages with no internal links. Broken links waste crawl budget and pass negative signals to Google.
Schema Markup
Structured data (JSON-LD) that helps Google understand your content type — articles, products, FAQs, local businesses, events. Without valid schema, you miss out on rich snippets that dramatically increase click-through rates.
AI Search Visibility
Whether your site is accessible to AI crawlers (GPTBot, PerplexityBot, ClaudeBot, Google-Extended). Sites blocking AI bots miss citations in ChatGPT, Perplexity, and Google AI Overviews — an increasingly important traffic source.
Mobile Usability
Viewport configuration, tap target sizes, font legibility on mobile, horizontal scroll issues. Google indexes mobile-first, so mobile issues directly affect your desktop rankings too.
Social & Open Graph
How your pages appear when shared on social media. Missing OG tags result in blank or malformed previews — dramatically reducing click-through when your content is shared.
How many checks does SEO-Snap run?
How to run a free SEO assessment in 60 seconds
No account needed. Works on any website — your own, a competitor's, or a client's.
Enter your URL at seo-snap.com
Paste your full website URL including https://. You can scan any public-facing URL — homepage, landing page, blog post, or product page.
The assessment runs automatically
SEO-Snap crawls your site and runs all 251 checks in the background. For most sites this takes 30–60 seconds. A progress indicator shows you which category is being checked.
Review your overall SEO health score
You get a score out of 100 and a letter grade (A to F). Below the score is a breakdown by category so you can see exactly where you are strong and where you are losing ground.
Read the issue list — Critical first
Issues are sorted by severity: Critical, Warning, and Pass. Critical issues are things actively harming your ranking right now. Warnings are problems that will hurt you if left unfixed. Pass items are working correctly.
Download your PDF assessment report
Every assessment generates a branded PDF with your full score, category breakdown, and prioritised fix list. You can share it with your developer or keep it as a benchmark.
How to read your SEO assessment score
Your overall score is a weighted average across all 251 checks. Here is what each range means in practice:
90–100 / 100
Excellent SEO health. Focus on content quality, backlinks, and AI visibility to grow further.
→ Keep monitoring. Run weekly checks to catch regressions.
75–89 / 100
Good foundation with addressable gaps. Fixing the remaining issues will push you into the top results.
→ Fix all Critical issues this week. Address Warnings over the next month.
60–74 / 100
Average SEO health. You are ranking, but missing significant opportunities and likely losing to competitors.
→ Audit each failing category. Start with Technical and On-Page before Page Speed.
40–59 / 100
Poor SEO health. Multiple serious issues are suppressing your ranking across the board.
→ Fix Technical issues first — crawl problems block everything else.
0–39 / 100
Critical SEO problems. Your site may be actively penalised or blocked from being indexed properly.
→ Check robots.txt and sitemap first. Then address all Critical items before anything else.
Most common SEO assessment findings
Based on assessments run through SEO-Snap, these are the issues that appear most frequently — and most often come as a surprise to site owners.
#1. Missing or duplicate meta descriptions
Found in 74% of sitesDirectly reduces click-through rate from Google search results. Each page needs a unique 150–160 character description.
#2. No schema markup
Found in 68% of sitesMisses rich snippets entirely. FAQs, reviews, breadcrumbs, and product info all require JSON-LD schema to appear in enhanced search results.
#3. AI bots blocked by robots.txt
Found in 61% of sitesGPTBot, PerplexityBot, and ClaudeBot are blocked. These sites are invisible in AI search answers — a growing traffic source.
#4. Core Web Vitals failing on mobile
Found in 58% of sitesLCP over 2.5s or CLS over 0.1 directly reduces rankings. Google's mobile-first index makes this a critical issue.
#5. Broken internal links
Found in 52% of sitesEvery broken internal link is crawl budget wasted. They also prevent link equity from flowing through your site correctly.
#6. Missing H1 tag or multiple H1s
Found in 44% of sitesEvery page needs exactly one H1 containing the primary keyword. Multiple H1s confuse crawlers about the page topic.
#7. No XML sitemap or sitemap not submitted
Found in 39% of sitesNew pages can take weeks to get indexed without a sitemap. Submit yours in Google Search Console to speed up indexing.
#8. Redirect chains (3+ redirects)
Found in 33% of sitesEach redirect in a chain loses link equity and adds load time. Chains of 3+ redirects should be collapsed to a single direct redirect.
Free SEO assessment vs paid tools — what you actually need
Semrush, Ahrefs, and Moz are powerful — and expensive. Semrush starts at $139/month. Ahrefs at $129/month. For most small businesses, freelancers, and startup founders, that is unjustifiable when they need to check basic SEO health.
SEO-Snap was built specifically for this gap: the depth of a professional SEO assessment, at a price that makes sense for sites that are not yet generating thousands of dollars per month from organic traffic.
| Feature | GSC (Free) | SEO-Snap (Free) | Semrush ($139/mo) |
|---|---|---|---|
| Number of checks | ~20 | 251 | 300+ |
| On-page audit | ❌ | ✅ | ✅ |
| Schema markup check | ❌ | ✅ | ✅ |
| AI bot visibility | ❌ | ✅ | ❌ |
| Instant results | ✅ | ✅ | ✅ |
| PDF report | ❌ | ✅ | ✅ |
| Requires setup | Yes (verify domain) | No | Yes |
| Monthly cost | Free | Free / $5/week | $139/month |
How often should you run an SEO assessment?
The honest answer: more often than you think. Most site owners run an SEO assessment once and then forget about it. That is a mistake — SEO health degrades over time.
After any major site change
A redesign, CMS migration, plugin update, or new page template can introduce new issues instantly. Run an assessment within 24 hours of any significant change.
Monthly at minimum
SSL certificates expire. External links go dead. Redirects accumulate. A monthly assessment catches these before they compound into a ranking drop.
Weekly if you are actively growing
If you are publishing new content, building backlinks, or running marketing campaigns, weekly monitoring is the standard. SEO-Snap automates this — your site is scanned every Monday.
When rankings unexpectedly drop
A sudden ranking drop is almost always traceable to a specific technical or on-page change. An SEO assessment run immediately after a drop will surface the cause.
⚠️ One-time assessments are not enough
Frequently asked questions
Is a free SEO assessment accurate?▼
Can I run an SEO assessment on a competitor's site?▼
What should I fix first after my SEO assessment?▼
Does an SEO assessment include keyword research?▼
How is SEO-Snap's assessment different from other free tools?▼
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