| Core function | Google Analytics 4 (GA4 — analytics.google.com) is Google's web analytics platform. It tracks user behavior on your site after users arrive: sessions, pageviews, engagement rate, average engagement time, scroll depth, conversion events (purchases, sign-ups, form submissions), and user journey across pages. GA4 uses an event-based data model (all interactions are events with parameters, replacing the session/pageview model of Universal Analytics). GA4 also tracks traffic sources — how users arrived at each page (organic search, direct, referral, paid, social) — making it useful for comparing organic search performance with other channels. GA4 is free (with a paid version, Google Analytics 360, for enterprise sampling needs). It requires a JavaScript tracking snippet on every page. | A crawl-based technical SEO and AI visibility auditor. Validates JSON-LD structured data against Google's Rich Results specifications at property level, measures Core Web Vitals from URL-level CrUX field data (same data Google uses for Page Experience ranking), detects JavaScript rendering gaps, checks canonical tags, validates robots.txt and sitemap configuration, detects broken links, and scores five GEO/AI visibility signals. Free with no signup. Does not track user behavior, traffic sources, or conversion events. |
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| Traffic and organic search analytics | GA4 provides detailed traffic source analysis: which channels (organic search, direct, paid, social, referral) drive sessions to each page, with session-level attribution across multi-touch journeys. For organic SEO specifically: GA4 shows organic search as a source/medium, landing page performance by organic session (which pages receive organic search traffic, their engagement rate and conversions), and country/device segmentation. However, GA4 does not show which specific keywords drove organic sessions — Google removed keyword-level data from GA4 in 2023 except for paid search. Keyword data requires Google Search Console. GA4's organic search data is the "what happened after users clicked" layer: traffic volume, page engagement, conversion rate by landing page. | No user traffic analytics. DeepSEOAnalysis audits what determines whether organic traffic arrives — technical SEO health, structured data eligibility for rich results, AI visibility signals — rather than measuring the traffic itself. The two tools operate at different points in the SEO funnel: DeepSEOAnalysis at the "why does this page rank or not rank" layer; GA4 at the "what do users do after they arrive" layer. |
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| Core Web Vitals measurement | GA4 can collect Core Web Vitals via the web-vitals JavaScript library: LCP, CLS, and INP events are sent as GA4 events (using gtag or the measurement protocol), allowing you to see Core Web Vitals distributions broken down by page, country, device, and connection type. This is session-level field data — real user measurements from your own site visitors, not CrUX's Chrome-wide sample. GA4 CWV data: granular and user-segment-able, but requires custom implementation (not automatic), and only includes users with GA4 tracking. It is not the data Google uses for Page Experience ranking signals (which uses CrUX, not GA4). Google announced in 2024 that GA4 would natively surface CWV data in the standard interface. | URL-level CrUX (Chrome User Experience Report) field data for Core Web Vitals — LCP, CLS, and INP at p75 from real Chrome user sessions, the same dataset Google uses for Page Experience ranking. Surfaced per-URL alongside the full technical SEO audit so CWV findings appear in context with structured data, canonical tag, and AI visibility findings. No custom implementation required — data comes from Google's CrUX dataset for any URL with sufficient traffic. |
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| Technical SEO capabilities | GA4 is not a technical SEO tool. It does not crawl pages, validate structured data, check canonical tags, audit robots.txt, detect broken links, or assess crawlability. Some technical SEO signals can be inferred from GA4 data (high exit rates on a page may indicate a content or UX problem; high bounce rates from organic sessions may indicate intent mismatch), but these are behavioral signals, not direct technical audits. GA4 does not validate whether a page's structured data is property-complete, whether the canonical tag points to the correct URL, whether Googlebot can access the page, or whether AI crawlers are blocked. For technical SEO diagnosis, GA4 must be combined with Google Search Console (crawling and indexing data) and a dedicated technical SEO audit tool. | Full technical SEO audit in one pass: property-level JSON-LD structured data validation (identifying exactly which required property is missing with corrected markup), canonical tag validity (absolute URL, correct destination, no redirect chain), robots.txt analysis (blockages, AI crawler access), sitemap validation, broken internal and external link detection, JavaScript rendering gap detection (schema only in client DOM, not initial HTML), heading structure, and Open Graph tag completeness. |
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| AI and GEO visibility scoring | GA4 has no AI visibility or GEO (Generative Engine Optimisation) features. It does not check whether AI search crawlers can access your site, whether llms.txt is present and structured, whether your content is marked up with FAQPage or HowTo JSON-LD for AI citation eligibility, whether your heading structure signals content answerability (question-heading ratio), or whether your content is chunked for AI extraction (section length ≤400 words). GA4 measures user behavior from traditional web browsers — it does not have awareness of AI-driven search traffic, which typically does not appear in GA4's referral sources (AI-cited content does not always generate tracked sessions). | Five-signal AI visibility score: (1) AI crawler access in robots.txt (GPTBot, ClaudeBot, PerplexityBot not blocked), (2) llms.txt presence and structure, (3) FAQPage or HowTo JSON-LD server-rendered in initial HTML, (4) question-heading ratio ≥20%, (5) content chunkability (average section ≤400 words). The GEO score appears in the same audit as Core Web Vitals and structured data findings. |
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| SEO keyword and ranking data | GA4 does not provide keyword-level organic search data. Google removed keyword attribution from GA4 (it appears as "(not provided)" in organic search dimensions). To see which keywords drive organic sessions, you need Google Search Console's Search Analytics report connected to GA4 via the GA4 + GSC integration. Even with the integration, keyword data in GA4 is limited to the top queries per landing page, not full attribution across all sessions. GA4 also does not track keyword rankings (position in search results) — rank tracking requires a dedicated rank tracking tool. | No keyword or ranking data. DeepSEOAnalysis audits technical SEO health — the conditions that allow a page to rank — rather than tracking which keywords it currently ranks for. Combining DeepSEOAnalysis (technical audit), GA4 (post-click behavior), and GSC (keyword and ranking data) covers all three layers of SEO intelligence. |
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| Best fit | GA4 is best for understanding what users do after they arrive at your site — which landing pages drive conversions, which traffic sources deliver the most engaged users, how users navigate through the site, and where in the conversion funnel they drop off. Essential for measuring the business impact of SEO work: did the pages you optimised receive more organic traffic and did that traffic convert? GA4 is a required part of any serious SEO workflow, but as a post-click analytics tool rather than a pre-click technical audit tool. | Best for a complete technical SEO audit in one pass: structured data validation, Core Web Vitals from CrUX, canonical and robots.txt analysis, broken link detection, and AI visibility scoring — free, no signup. The intended workflow: DeepSEOAnalysis to diagnose what prevents pages from ranking (technical issues, missing schema, AI visibility gaps), GA4 to measure what happens to organic traffic after those issues are fixed, GSC to track which keywords and pages are improving. |
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