The Extension analyzes a page across 12 in-depth tabs. Below is a summary of each tab, organized by group.
Core group: performance and technical
Performance
Measures page load speed and experience using Core Web Vitals, including real user data (Field Data, CrUX) and lab data (Lab Data, Lighthouse), for both Mobile and Desktop.
| Metric | Good | Needs improvement | Poor |
|---|---|---|---|
| LCP (Largest Contentful Paint) | under 2.5s | up to 4s | over 4s |
| INP (Interaction to Next Paint) | under 200ms | up to 500ms | over 500ms |
| CLS (Cumulative Layout Shift) | under 0.1 | up to 0.25 | over 0.25 |
Technical
Checks Crawl and Index (HTTPS, canonical, sitemap, robots.txt, hreflang, viewport, charset, doctype, HTML lang, text/HTML ratio, favicon, redirects), Security (CSP, X-Frame-Options, HSTS), Accessibility (ARIA, color contrast, focus), plus code quality, rendering, and fonts/CSS.
Domain
Moz Domain Authority (DA, PA, Spam Score, 12-month history), the number of referring domains and backlinks, registration details (domain age, creation date, DNS, nameservers), and SEMrush data when available.
Content group: content and keywords
Meta Tags
Title (ideally 10 to 60 characters), Description (ideally 70 to 160 characters), Open Graph, Twitter Card, and a SERP Preview that simulates how the page appears on Google.
Structured Data
The @type values detected (Article, Product, FAQ, Organization, WebSite, Person), the main schema and entity schema, special schemas (Speakable, ImageObject, BreadcrumbList), JSON-LD validation, and sameAs links to Wikipedia/Wikidata.
Headings
There should be exactly one H1 (ideally 20 to 70 characters), at least three H2s, and an H3 whenever there is an H2. Displays the H1 to H3 hierarchy tree and checks whether headings have an ID for deep-linking.
Keywords
Keyword density for 1-, 2-, and 3-word phrases; a stuffing warning when density exceeds 3%; a check on whether keywords in the Title appear in the content; plus diversity and bolding.
Content
Readability (word count, sentence structure, Flesch-Kincaid grade level, paragraph length, scannability), with dedicated measurement support for Vietnamese. E-E-A-T signals: author and bio, publish/update dates, cited sources, expertise and trust signals, and freshness.
Conversion, Media, Links, and Social group
Conversion
CTA and above-fold placement, trust signals (reviews, returns, payment badges, hotline, contact page, Zalo), navigation and UX, and forms (field labels, autocomplete, optimal field count of 1 to 7).
Media
Alt text coverage, unique descriptions, reasonable dimensions, smart loading (lazy-loading), modern formats (WebP/AVIF), and no broken images. Includes a detailed per-image table.
Links
Link scoring (clean links, an internal link target of 5+, anchor diversity, balanced outbound), a link table with rel attributes, and citation quality. Three or more distinct domains is a strong authority signal for AI search.
Social
Social media profiles (target of three or more platforms), schema coverage within Organization, share buttons, and Social Preview for Facebook, LinkedIn, and Twitter.