We are bound to follow daily metrics of our game in order to create the best experience. Monitoring

daily metrics helps us understand how players are interacting with our game and enables us to make

informed decisions. Below, there are some terminologies and you are expected to search and

understand them.

DAU: Daily Active User

ARPDAU: Average Revenue per Daily Active User

Retention$($x$)$: Percentage of users who returned to play the game on specifically x days after their

install.

Assume there is an A$/$B test for your new game. There are daily $10\mathrm{.}000$ installs for each variant and

some metrics of A$/$B variants are given below: