Growth/Personalized first day/Variant testing

Starting in December 2019, the Growth team wants to start testing variants of features against each other -- instead of just building one version of a feature and seeing whether it does or does not increase new editor retention. Testing variants will help us learn and iterate faster. This page contains running lists of variants we want to test for our different features, which we'll draw from when planning tests going forward. The lists are long and exhaustive, but we expect to test under 10 of these per year.

Newcomer tasks variants
Below is the list of feature variants we would be interested in testing for newcomer tasks.

General homepage variants
Below is the list of feature variants we would be interested in testing for the newcomer homepage.