Go to https://developers.pinterest.c...
Here you will see the instructions for adding Rich Pins from Pinterests side.
It is quite simple. All you need is to copy any URL from your website and enter it in the box provided. It is not in this image as I had already filled it in.
One you press Validate you will get a message saying Thankyou and an email will be sent to you if they have any questions or to give you the next steps.
You will also see something like this.
Now you can see how my associated image shows up automatically.
Now you wait. They say it can take up to a week to hear back but I got my email within an hour. Don't panic if it doesn't come back to you that quickly though. You might need some patience.
You should get an email like this.
And now you everything you pin from your website should be Rich Pins.