Growth/Analytics updates/Newcomer homepage leading indicators

The Newcomer Homepage was deployed to the Czech and Korean Wikipedias on May 6, 2019. Prior to deployment, we published our Measurement and experiment plan. That plan lays out a set of leading indicators that we'll monitor after deployment in order to learn whether the Homepage works as intended or not. We monitored the leading indicators regularly during the first month of the experiment and did not find issues that required immediate attention. Instead, we find that the Homepage is seeing a lot of traffic and interactions, in particular we notice that a high proportion of users are returning to it multiple times.

Table 1 below shows the leading indicators from the Measurement experiment plan together with results from both Wikipedias. Users who either self-selected into or out of having the Homepage (turning the option on or off) are excluded, as is any known test account from Growth Team members.

There's one threshold that has been met, modules not being extensively used, and two areas of concern. Below we address these in more detail:


 * Not using a specific module: The only module that is not being used extensively is the Help module, which provides users with links to help content and a dialogue for posting questions to the Help Desk. We are not particularly concerned about this, partly because some users are interacting with it (mainly following the help links), and partly because it's not a problem if our users do not have a strong need to post questions to the Help Desk from the Homepage. Instead, we are seeing Homepage users posting questions to their mentors.
 * Not visiting the homepage: The threshold is not met on either wiki, but it can be labelled as "not far off" on Korean Wikipedia. Since we are in the process of developing features that help new users discover the Homepage, we do not see this as an issue as we expect that feature to reduce this proportion.
 * Not enough mentors: It does not appear that the volume of questions is difficult to deal with on either wiki. That being said, allowing new users to post questions to their mentors is a system where we are relying on individuals to respond, which can result in longer response times than what we might see on a wiki's Help Desk. At this point we do not find cause for concern, but it is an area that we will keep an eye on.