Why statistics matter
To know how often the pages of your app are viewed or which feature is used the most is hugely important. It lets you know how to improve your app, and more importantly what to improve in priority.
Roman Nurik, Android Developer Advocate at Google pointed out this need in this post about « Improving App Quality ».
As he says, statistics can lead you to move some less used functionalities of your app into a sub-menu, or even remove them entirely.