As part of T391035, one of the interventions is to deploy a CentralBanner notice on small wikis (likely around 5) and study its use and impact on increasing awareness about small wikis, contributors, the use of growth features, and ultimately content growth. More details here T391045.

For selection criteria, it may be necessary to stick with the same set of wikis as for the GrowthExperiments T391041, as the two interventions are related. It might be necessary to also determine the high traffic Wikipedia for the smaller language wiki where the banner is to be shown.

For the measurement plan, although what we want to measure currently depends on T390967, some things we could examine include:

• Number of page views on articles on small wikis
• Number of readers reached
• Number of Wikimedia accounts reached
• Number of active users of GrowthExperiments
• Number of active editors at the beginning vs. after three months of deployment
• Number of bytes added