Search "openvpn" in App Store and install "OpenVPN Connect":
Next step is to get openvpn configuration files from your client area (you should login in order to access it). You will find a lot of available configs for different servers worldwide you can connect to. You should get ones you want to connect to. Send .ovpn files to your device via iTunes or email (described here). Open email in iPad mail app and open attachment in OpenVPN Connect application:
Import OpenVPN profile into OpenVPN Connect app:
Fill your username in "User ID" field and password in "Password" field. Set "Connection" to ON:
Choose "Yes" on "Allow OpenVPN to enable VPN connection?" question:
You will see:
Now all your traffic is secure and you are 100% anonymous!