Pinterest's "source" field and why you need it
When it comes to scheduling posts for Pinterest, you will need to include a "source" URL for the image. This will be the web address the pin will redirect to. Buffer will typically pre-fill the source field if you're including a link within the body of your post. If you're not including a link, you will still need to specify a URL in the "source" field. If you try to add a post to the queue without specifying a source URL, you will see the following message:
"When creating an update for Pinterest profiles, you must provide a source_url"
Or if you're using Buffer's mobile app on iOS or Android, you will see the following message:
"Whoops. Parameter missing. Please try again."
To resolve this, please enter a URL within the "source" field.