Deep dive: the 'red button beat green' case — and why the color was never the point The question: does CTA button color move conversions? A famous test, popularized through HubSpot's own experiment, p…
Deep dive: why '83,412 users' outconverted '80,000+ users' in a real test The question: does the precision of a social-proof number matter, or just its size? A line of persuasion research, building on…
Deep dive: the case where a longer page beat the short one by 37.5% The question that breaks the 'keep it above the fold' dogma: is a short page always better? A frequently-cited test from 37signals' …
Deep dive: the headline-swap experiment that lifted PPC conversions 21% by saying nothing new The question: how much does it cost when your ad and your landing page tell slightly different stories? Th…
Deep dive: Walmart's load-time curve and what every fast point bought them The question: is page speed a vanity metric or a revenue lever? Walmart's engineering team published one of the most-cited da…
Deep dive: the form-field cut that turned a 11-field form into 120% more conversions The question everyone quotes but few source: how much does each extra form field actually cost? The cleanest public…
