Our goal for this lesson is to generate signup events based on the table we have from Bindle’s production database. The trick here is to distinguish between the web and mobile signups because we want to calculate the activation rate for our mobile app.
The information about device types (web browser or mobile app) of our users is stored in the
devices table. To determine whether a user signed up via browser or a mobile app we need to find the very first
devices record for a user. I bet you don’t remember what all possible values of the