The first thing you need to do in order to connect to OVPN is to install OpenVPN Connect for iOS.
Choose to Open in "OpenVPN" after you've clicked on the download button above
You can now import the configuration profile as a profile by clicking on Add.
Enter you credentials for your OVPN account and click on Add in the top right corner when you're done.
Connect by clicking on the grey toggle that appears next to the profile name.
You should now be connected to OVPN and you will see
You should now be connected to OVPN and be able to browse the internet safely. To make sure everything was set up correctly, please check the dashboard to verify that you are connected.