When ordering OptiSticks via the OptiSigns portal, you can put in Wi-Fi information & credentials and the device will be configured with those Wi-Fi details before shipped out.
This is very useful and will save you time in deployment. You can also provide a name for the device here, which will help you figure out which device goes where.
To set up Wi-Fi, click the Want to enter Wi-Fi info? button on the OptiSigns configuration page - step 2 of checkout:
Clicking the button will open up a menu where you can enter the information.
If this information is put in correctly, the OptiStick will automatically log on to your Wi-Fi when plugged in, allowing it to connect directly to OptiSigns and automatically pair the screen. This will let you quickly assign content or playlists to that screen.