If appears at the top of the screen, you're connected to a Wi-Fi network, and iPad reconnects anytime you return to the same location.
Join a Wi-Fi network or adjust Wi-Fi settings. Go to Settings > Wi-Fi.
Set up your own Wi-Fi network. If you have a new or unconfigured AirPort base station turned on and within range, you can use iPad to set it up. Go to Settings > Wi-Fi and look for "Set up an AirPort base station." Tap your base station and the Setup Assistant does the rest.
Manage your AirPort network. If iPad is connected to an AirPort base station, go to Settings > Wi-Fi, tapnext to the network name, then tap Manage this Network. If you haven't yet downloaded AirPort Utility, tap OK to open the App Store and download it (this requires an Internet connection).