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To test two versions of a page, you publish both and add a content router. The router sits at one address and decides which version each visitor sees. There’s no separate testing tool. Two pages plus a router is the whole mechanism. For routing emails, and for how routers work in general, see Copy and variants.

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What a page router can do

A router for pages can split visitors at random, such as 50/50 or 60/40 between two versions. Each visitor keeps seeing the same version when they come back.
Page routers split visitors by chance only. Rules based on locale, persona or segment work for emails. They don’t work for landing pages.

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Set one up

1

Build and publish each version

Make each version as its own page, and publish them. A router can only choose between pages that already exist and are published. See Creating a landing page.
2

Ask Mary for the router

Tell Mary which pages to split between and in what proportions. She drafts the router and explains how she grouped them.
3

Confirm it

Routing decides who sees what, so it never starts on its own. Look at the router’s rules and its preview, then confirm.
4

Publish the router

Choose the router’s address in the library and publish it, the same way you’d publish a page. Share that address. Visitors land on the router, and the router sends them to a version.
When this works, the router’s address shows one version to each visitor, and the same visitor sees the same version on their next visit.

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What gets recorded

Every page view and form submission records which version the visitor saw. Only the version is kept, never who the visitor is, so sharing a link reveals nothing about the person who shared it.
allGood doesn’t report which version performed better. The router splits visitors correctly.