Studies
Merchant Center feed fixes and three click gains, per Uproer
Uproer's published case study reports feed-level Google Merchant Center changes lifted clicks 130%, 116% and 3,500 for three unnamed ecommerce brands.
Case studies
30 articles · RSS
Documented before and after work on real sites, with the measurement method attached.
Studies
JunkCarsUs: HCU recovery from 30-50 to 400-500 clicks a day
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
Log analysis cut a jewelry site from 16M to 730K crawlable pages
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
Nuvemshop lifted good LCP from 57% to 96% by fixing image loading
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.
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Programmatic SEO case: 100 pages, 398% traffic, per Suso Digital
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
CoinStats fixed a Core Web Vitals bug, tripled search impressions
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.
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Home Science Tools: pruning 200 blog pages, organic sessions up 104%
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
IFTTT's internal linking fix and its 33% YoY traffic gain
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
Marshfield Clinic: 454% CTR gain from schema markup
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
Simms Fishing's Magento to Shopify migration: the real numbers
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
llms.txt is a vendor standard, not a publisher one
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
How often Google rewrites a title tag: 61.6% to 76%
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
SearchPilot: removing a breadcrumb link cut organic traffic 5.5%
SearchPilot split-tested removing a self-referential breadcrumb link on PLPs. Traffic fell 5.5%, likely from a schema markup mismatch left behind.
Studies
Does llms.txt do anything? Three studies say mostly no
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
SearchPilot: canonicalizing to a variant lifted variant traffic 22%
SearchPilot canonicalized product pages to a variant's URL instead of self-referencing. Variant pages gained 22%; main pages stayed inconclusive.
Studies
DOM.RIA's internal linking rebuild and its Googlebot crawl visits
JetOctopus's case study on real estate site DOM.RIA, reworking internal links to poorly-crawled directory pages roughly tripled Googlebot visits to them.
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AI citation patterns shift sharply by search intent, Wix data shows
Wix Studio's AI Search Lab found articles win informational queries 2.7x more, and listicles and product pages win commercial and transactional ones.
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Three named companies that disclosed real AI-search traffic losses
Chegg, Business Insider and HubSpot all show real, checkable declines. A widely repeated CNN figure does not survive a source check.
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How long domain migrations take to recover organic traffic
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.
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Google's own data: Rakuten and Vodafone Core Web Vitals A/B tests
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
SearchPilot: promoting an H2 to H1 lifted organic traffic 4.5%
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
JSON-LD structured data adoption grew from 34% to 41% of pages
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.
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One publisher's Google Discover traffic loss and recovery
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
Deloitte: 0.1s faster mobile speed lifted retail conversion 8.4%
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.
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Ahrefs: AI Overviews cut position-1 CTR by 58%
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.
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SearchPilot: FAQ content lifted traffic, FAQ schema did not
SearchPilot split-tested FAQ content and FAQ schema. Content added 9.7% more organic clicks; removing schema alone changed nothing.
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Zero-click Google searches hit 68% in the US
SparkToro and Similarweb's June 2026 report puts US Google zero-click search at 68.01%, up from 60.45% in 2024.
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Mobile vs desktop Core Web Vitals: INP gap widest, CLS flips
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.
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SearchPilot: nearby-region links lifted organic traffic 7%
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.
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Google's own numbers: structured data lifted CTR 25-82%
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.