Do hero image A/B tests work in E-commerce?

In line with both baselines. Hero image tests win 15% in E-commerce, against 17% for hero image tests generally and 14% for E-commerce generally. Neither the category nor the vertical is moving this much.

The strongest change type we can measure in E-commerce is CTA copy at 17% on 50+ tests.

Small winner set. Few of these tests cleared the bar. The 95% interval on that win rate runs 8% to 26%, so read the figure as directional.

The numbers

	E-commerce	all industries
Tests analysed	50+	100+
Beat control	15%	17%
No measurable difference	65%	—
Lost to control	20%	—
Median lift when it won	not reported	—

Median traffic per variant was 1602 visitors. Most ran on homepages (21), product pages (18), landing pages (6).

Every change type we can measure in E-commerce

change type	win rate in E-commerce	tests
CTA copy	17%	50+
Layout	16%	100+
Styling	16%	500+
Hero image (this page)	15%	50+
Body copy	14%	100+
Price framing	12%	50+
Split URL	11%	250+
Headline	8%	100+
Social proof	8%	50+

The industry overview is at E-commerce benchmarks; rates across all industries are on the hero image benchmark.

What counts as a hero image test

The main visual is swapped, cropped or replaced. Surrounding copy stays as it was.

Control and variant wireframe for a hero image A/B test — Control on the left, variant on the right. Only the changed element is highlighted.

Hero image tests that won in E-commerce

Replaces the light-background stats section with a dark full-bleed video hero, adds a new quality-focused headline, and places a trust badge/logo bar below.
replaces the first carousel banner image with a different image (device-specific) and adds click tracking to it
Inserts a new autoplaying background video hero section with headline, text, and CTA button above the homepage content
Category banner image for Glucosamine product listing

Hero image tests that did not

replaces the banner image (desktop/mobile) and sets a dark background color on the banner link
Replaced fantasy hero image/headline with a photo of an older woman holding the product bottle and decorative icons, with no bold headline text
Replaces the hero section's video source with a different video for both mobile and desktop on the home page

These are individual tests, not rules. Each ran on one site, with one audience, against one page we are not showing you. They are picked to be illustrative rather than sampled at random, and a change that won here can lose on your page for reasons none of this captures. Read them as prompts for what to test, not as findings to copy.

Who ran these tests

This is every Mida account that ran a readable test — in-house marketers, founders, product teams, and agencies working on client sites. Nothing here is filtered by who ran the experiment or how experienced they are.

Low win rates are normal in experimentation, including at the top end. Microsoft's experimentation team, reporting on its own platform, found that only about one third of ideas improve the metric they were designed to improve — and that roughly another third actively hurt it. That is a dedicated experimentation organisation with research, prioritisation and review behind every test.

A mixed population like this one runs below that. The gap is roughly what disciplined practice buys you: ideas grounded in research rather than opinion, one variable at a time, and tests built so the result can actually be read.

So treat these as a general base rate, not a target. If you would rather not close that gap the slow way, find a CRO agency in the United States, the United Kingdom, the Netherlands or Australia — or browse every region.

A win is a variant that beat its control on that test's primary goal with a statistically significant result. Tests that never got enough traffic to say anything either way are excluded. The methodology has the full detail, including what these numbers cannot tell you.