This attribute is optional
Used to add additional image links. The images may include different angles, colours etc.
This gives the user the option to view different variants that might exist for a product.
Standard: RFC 3986
Limit: maximum 2047 characters
Yes, add up to 10 attributes of this type
Start with http or https
Follow RFC 3986
Make sure your URL can by crawled
Use stable url
Use verified domain
Replace symbols or spaces with URL encoded entities