OTA(Over the Air) Deployment enables you to install your built apps(.ipa/apk) via HTTPS.
The steps to install apps via this method are as follows:
-Download the .ipa file to your device or icloud.
-Upload the .ipa to any such site which create a shareable installation link using the uploaded .ipa file
For the above step there are several sites paid/free from where you can get the installation link by uploading the .ipa file.
I found the below one to be free, easy and reliable: https://www.installonair.com