Out of the box, your Android smartwatch comes with various watch faces and there are plenty of other watch faces that you can download. They are available in any shape or type: square and round or analogue and digital. Actually, there is even another shape - the so-called flat tire one - as seen on the Moto 360 device.
There are many customization options that you can think of but all watch faces are about displaying time and date information in an easy way. This is what watches are for in the first place, aren't they?
They should be aware of incoming notifications and also need to make room for the system indicators such as the battery life icon and the Ok Google text. For more information, check out https://developer.android.com/design/wear/watchfaces.html.
What we will create in the upcoming recipe is a watch face that tells you the time, for example, half past seven or five minutes past ten.