https://seomadman.com Documented before and after work on real sites, with the measurement method attached. en https://seomadman.com/studies/google-merchant-center-feed-optimization-uproer https://seomadman.com/studies/google-merchant-center-feed-optimization-uproer Fri, 18 Sep 2026 00:00:00 GMT Adam Hafez Uproer's published case study reports feed-level Google Merchant Center changes lifted clicks 130%, 116% and 3,500 for three unnamed ecommerce brands. studies technical-seo https://seomadman.com/studies/hcu-recovery-junkcarsus-seoprofy-case https://seomadman.com/studies/hcu-recovery-junkcarsus-seoprofy-case Fri, 18 Sep 2026 00:00:00 GMT Adam Hafez SeoProfy's case study on JunkCarsUs: after the September 2023 HCU, pruning pages and rewriting templates preceded a rise to 400-500 daily clicks. studies core-updates content-strategy https://seomadman.com/studies/jetoctopus-log-analysis-parameter-crawl-waste-case-study https://seomadman.com/studies/jetoctopus-log-analysis-parameter-crawl-waste-case-study Fri, 18 Sep 2026 00:00:00 GMT Adam Hafez A JetOctopus case study: log files showed Googlebot spending crawl on filter, sort and pagination URLs, and closing them shrank the site to 730K pages. studies technical-seo indexing https://seomadman.com/studies/nuvemshop-lcp-image-priority-case-study https://seomadman.com/studies/nuvemshop-lcp-image-priority-case-study Fri, 18 Sep 2026 00:00:00 GMT Adam Hafez Nuvemshop's web.dev case study: removing lazy loading on top images and adding fetchpriority took good LCP from 57% to 96% across its stores. studies technical-seo https://seomadman.com/studies/programmatic-seo-saas-100-pages-suso-digital https://seomadman.com/studies/programmatic-seo-saas-100-pages-suso-digital Fri, 18 Sep 2026 00:00:00 GMT Adam Hafez Suso Digital reports a software supply chain client grew organic traffic 398.49% in 18 months from about 100 template pages. What the case shows. studies content-strategy https://seomadman.com/studies/coinstats-core-web-vitals-organic-traffic https://seomadman.com/studies/coinstats-core-web-vitals-organic-traffic Wed, 16 Sep 2026 00:00:00 GMT Adam Hafez DebugBear's case study: CoinStats found Base64 images were bloating 15,000 pages, fixed it, and saw Good URLs and search impressions both increase 3x. studies technical-seo https://seomadman.com/studies/homescience-tools-content-pruning-case-study https://seomadman.com/studies/homescience-tools-content-pruning-case-study Wed, 16 Sep 2026 00:00:00 GMT Adam Hafez Inflow's case study on HomeScienceTools.com: removing roughly 200 low-value blog pages preceded a 104% rise in sessions and 102% rise in transactions. studies content-strategy https://seomadman.com/studies/ifttt-internal-linking-traffic-case-uproer https://seomadman.com/studies/ifttt-internal-linking-traffic-case-uproer Wed, 16 Sep 2026 00:00:00 GMT Adam Hafez Uproer's case study on IFTTT: searchbots reached only 59 pages via internal links until a fix, after which the site saw 33% YoY organic traffic growth. studies technical-seo https://seomadman.com/studies/marshfield-clinic-schema-markup-ctr-case-study https://seomadman.com/studies/marshfield-clinic-schema-markup-ctr-case-study Wed, 16 Sep 2026 00:00:00 GMT Adam Hafez Schema App's customer story on Marshfield Clinic reports a 454% CTR increase when a Review Snippet was awarded, plus 32% from entity linking. studies structured-data https://seomadman.com/studies/simms-fishing-magento-shopify-migration https://seomadman.com/studies/simms-fishing-magento-shopify-migration Wed, 16 Sep 2026 00:00:00 GMT Adam Hafez Inflow's case study: Simms Fishing saw organic traffic up 126% YoY and non-brand category traffic up 5,642% after a Magento to Shopify move. studies technical-seo https://seomadman.com/studies/llms-txt-adoption-2026 https://seomadman.com/studies/llms-txt-adoption-2026 Thu, 10 Sep 2026 00:00:00 GMT Adam Hafez Only 14 of 60 major sites serve an llms.txt. Half of them sell SEO or hosting software. One is a news publisher. The file has an audience problem. studies ai-search technical-seo https://seomadman.com/studies/title-tag-rewrite-rate-study https://seomadman.com/studies/title-tag-rewrite-rate-study Tue, 08 Sep 2026 00:00:00 GMT Adam Hafez Two independent studies measured how often Google rewrites a title tag rather than using it as written: 61.6% in 2022, 76% by 2025. studies technical-seo https://seomadman.com/studies/breadcrumb-link-removal-ab-test-searchpilot https://seomadman.com/studies/breadcrumb-link-removal-ab-test-searchpilot Sat, 05 Sep 2026 00:00:00 GMT Adam Hafez SearchPilot split-tested removing a self-referential breadcrumb link on PLPs. Traffic fell 5.5%, likely from a schema markup mismatch left behind. studies technical-seo structured-data https://seomadman.com/studies/llms-txt-measured-traffic-impact https://seomadman.com/studies/llms-txt-measured-traffic-impact Thu, 03 Sep 2026 00:00:00 GMT Adam Hafez 97% of published llms.txt files get zero AI-bot requests. A 10-site traffic test found no effect in 8 cases. The one positive figure has its own confound. studies ai-search https://seomadman.com/studies/canonical-product-variant-ab-test-searchpilot https://seomadman.com/studies/canonical-product-variant-ab-test-searchpilot Sun, 30 Aug 2026 00:00:00 GMT Adam Hafez SearchPilot canonicalized product pages to a variant's URL instead of self-referencing. Variant pages gained 22%; main pages stayed inconclusive. studies technical-seo https://seomadman.com/studies/internal-linking-crawl-coverage-case https://seomadman.com/studies/internal-linking-crawl-coverage-case Thu, 27 Aug 2026 00:00:00 GMT Adam Hafez JetOctopus's case study on real estate site DOM.RIA, reworking internal links to poorly-crawled directory pages roughly tripled Googlebot visits to them. studies technical-seo https://seomadman.com/studies/ai-citation-by-search-intent-wix https://seomadman.com/studies/ai-citation-by-search-intent-wix Mon, 24 Aug 2026 00:00:00 GMT Adam Hafez Wix Studio's AI Search Lab found articles win informational queries 2.7x more, and listicles and product pages win commercial and transactional ones. studies ai-search https://seomadman.com/studies/named-publisher-traffic-declines https://seomadman.com/studies/named-publisher-traffic-declines Fri, 21 Aug 2026 00:00:00 GMT Adam Hafez Chegg, Business Insider and HubSpot all show real, checkable declines. A widely repeated CNN figure does not survive a source check. studies ai-search https://seomadman.com/studies/domain-migration-recovery-time https://seomadman.com/studies/domain-migration-recovery-time Wed, 19 Aug 2026 00:00:00 GMT Adam Hafez A 892-migration study found the average new domain took 523 days to match the old domain's organic traffic, and 17% never did within 1,000 days. studies technical-seo https://seomadman.com/studies/rakuten-vodafone-core-web-vitals-case-studies https://seomadman.com/studies/rakuten-vodafone-core-web-vitals-case-studies Mon, 17 Aug 2026 00:00:00 GMT Adam Hafez Google's web.dev logged two named A/B tests: Rakuten 24 saw 53.37% more revenue per visitor, Vodafone Italy saw 8% more sales after a 31% LCP gain. studies technical-seo https://seomadman.com/studies/h2-to-h1-ab-test-searchpilot https://seomadman.com/studies/h2-to-h1-ab-test-searchpilot Tue, 11 Aug 2026 00:00:00 GMT Adam Hafez SearchPilot split-tested changing a travel site's top heading from an H2 to an H1. The change produced a statistically significant 4.5% traffic increase. studies technical-seo https://seomadman.com/studies/structured-data-adoption-web-almanac https://seomadman.com/studies/structured-data-adoption-web-almanac Tue, 11 Aug 2026 00:00:00 GMT Adam Hafez HTTP Archive's Web Almanac found JSON-LD on 41% of pages in 2024, up from 34% in 2022, while RDFa and Open Graph stayed the most common formats. studies structured-data technical-seo https://seomadman.com/studies/discover-traffic-recovery-case https://seomadman.com/studies/discover-traffic-recovery-case Sun, 09 Aug 2026 00:00:00 GMT Adam Hafez A consultant's self-reported case: a client site's Discover impressions hit zero for weeks, then recovered after a quality fix. One case, not a study. studies content-strategy https://seomadman.com/studies/page-speed-conversion-rate-impact https://seomadman.com/studies/page-speed-conversion-rate-impact Sat, 08 Aug 2026 00:00:00 GMT Adam Hafez Deloitte's 2019 study of 37 brand sites found a 0.1s mobile speed gain lifted retail conversion 8.4%. Shopify data adds a 100ms benchmark. studies technical-seo https://seomadman.com/studies/ai-overviews-click-through-rate-decline https://seomadman.com/studies/ai-overviews-click-through-rate-decline Thu, 06 Aug 2026 00:00:00 GMT Adam Hafez Ahrefs analyzed 300,000 keywords via Google Search Console and found AI Overviews now cut position-1 organic CTR by 58%, up from 34.5% a year earlier. studies ai-search search-console https://seomadman.com/studies/faq-content-ab-test-searchpilot https://seomadman.com/studies/faq-content-ab-test-searchpilot Wed, 05 Aug 2026 00:00:00 GMT Adam Hafez SearchPilot split-tested FAQ content and FAQ schema. Content added 9.7% more organic clicks; removing schema alone changed nothing. studies content-strategy structured-data https://seomadman.com/studies/zero-click-search-2026 https://seomadman.com/studies/zero-click-search-2026 Tue, 04 Aug 2026 00:00:00 GMT Adam Hafez SparkToro and Similarweb's June 2026 report puts US Google zero-click search at 68.01%, up from 60.45% in 2024. studies ai-search content-strategy https://seomadman.com/studies/mobile-desktop-cwv-pass-rate-gap https://seomadman.com/studies/mobile-desktop-cwv-pass-rate-gap Sun, 02 Aug 2026 00:00:00 GMT Adam Hafez HTTP Archive's July 2025 data broken down by metric: INP splits mobile and desktop by 20 points, LCP by 12, and CLS reverses the pattern entirely. studies technical-seo https://seomadman.com/studies/nearby-regions-internal-linking-ab-test-searchpilot https://seomadman.com/studies/nearby-regions-internal-linking-ab-test-searchpilot Tue, 28 Jul 2026 00:00:00 GMT Adam Hafez SearchPilot split-tested linking each of 8,000 regional pages to its 6 nearest neighbors. Linked pages saw a 7% organic traffic uplift over controls. studies technical-seo https://seomadman.com/studies/structured-data-ctr-google-case-studies https://seomadman.com/studies/structured-data-ctr-google-case-studies Mon, 27 Jul 2026 00:00:00 GMT Adam Hafez Google's own documentation reports Rotten Tomatoes at 25% higher CTR and Nestle at 82% higher CTR from structured data. Here is what each figure measures. studies structured-data