I discovered a bit more data being sent for the shopping case that wasn't documented in the original data-review doc, and I will be updating that momentarily. The `about:welcome` code has some `utm_*` variables. In the shopping cases of `about:welcome`, they have two main uses: * they can be sent as part of telemetry, in which case they come from [ComputeTelemetryInfo](https://searchfox.org/mozilla-central/rev/44a7ece8626d9bc418da7d13341f9163817d199b/browser/components/newtab/content-src/aboutwelcome/aboutwelcome.jsx#90) and can be the string "aboutwelcome-default" or a string which includes "aboutwelcome" along with an experiment and branch name, if the user is enrolled in an experiment. * they can sent to SuMo or fakespot.com when a user clicks on a [URL leading to one of those places](https://phabricator.services.mozilla.com/rMOZILLACENTRAL72539a68ac59d662c928abf30c2d068f69982223#change-hT52azhdWA39).
Bug 1851852 Comment 7 Edit History
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I discovered a bit more data being sent for the shopping case that wasn't documented in the original data-review doc, and I will be updating that momentarily. The shopping templates send a few specific `utm_*` variables: to SuMo or fakespot.com when a user clicks on a [URL leading to one of those places](https://phabricator.services.mozilla.com/rMOZILLACENTRAL72539a68ac59d662c928abf30c2d068f69982223#change-hT52azhdWA39).