About the same as anywhere else. CTA copy tests win 11% of the time on homepages, against 12% across all page types. This page neither helps nor hurts the change type.
Layout tests carry a higher published rate on homepages — 20% on 100+ tests — though see the note below before reading that as a recommendation.
| homepages | all page types | |
|---|---|---|
| Tests analysed | 100+ | 250+ |
| Beat control | 11% | 12% |
| No measurable difference | 75% | — |
| Lost to control | 14% | — |
| Median lift when it won | +24.7% | — |
Median traffic per variant was 2226 visitors.
| change type | win rate on homepages | tests |
|---|---|---|
| Layout | 20% | 100+ |
| Price framing | 16% | 49 tests |
| Hero image | 15% | 50+ |
| Split URL | 13% | 100+ |
| CTA copy (this page) | 11% | 100+ |
| Social proof | 10% | 50+ |
| Styling | 10% | 500+ |
| Headline | 8% | 250+ |
| Body copy | 8% | 100+ |
Only change types with at least 30 tests on homepages appear here.
A win rate only means as much as the thing being counted, so this is what these tests were actually optimising for.
| measured outcome | share of tests |
|---|---|
| Purchase / order complete | 43% |
| Signup / registration | 16% |
| On-page click / engagement | 14% |
| Lead / form submission | 8% |
Outcomes below 5% of the set are not listed, so these do not sum to 100. How the outcome was measured moves the win rate a lot — see the methodology.
These rates are not like-for-like. How often a test wins depends partly on what it chose to measure: a goal that records a soft signal — a click, a scroll — clears the bar more often than one that records a purchase. Across this data, tests measured against a proxy goal win 13%, against 9% for tests measured against a business outcome.
Categories differ a lot in that mix — proxy goals account for anywhere from 2% to 41% of a category's tests.
Hold the metric fixed and the spread narrows sharply. Comparing only tests measured against a business outcome, the gap between the highest and lowest category falls from 9 points to 6 — at which point the intervals overlap and the categories are not statistically distinguishable.
So read the table as a description of what happened, not as a ranking of what works. If you want the comparison to mean something, compare categories that were measured the same way. The methodology page has the full breakdown.
The button's words change. Size, colour and position stay as they were. Change the colour too and you have two variables.
The add to basket button text changed to quick add to basket, and the quantity field was hidden.
The donate link text changed to a more generic support phrase, and the CTA button background changed from its previous color to green.
The CTA button text changed to “Create my FREE account” and now linked to the registration page, and a new paragraph was added above the existing text with a free-lessons, no-card, one-minute benefit line.
The catalog trial buttons changed from their original text to a free-download label, and click tracking was added.
The CTA button text changed from the original wording to a Portuguese free-start phrase with an arrow symbol added at the end.
The read-more and read-less button text was changed from the original wording to Danish equivalents.
The subscribe button text changed to a membership call to action, and its width and spacing were adjusted.
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.
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.
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