Dear SEO Experts,
Goal: Avoid being penalized (duplicate page penalty) because of same content+ID but different subdomains.
It's not yet posted to production yet but it will be in the next few days.
e.g. now only the IDs are different but the content is the same.
After the update the 2 or more subdomains will point to the same ID.
Each subdomain corresponds to a city name.
Can I post some headers or something to avoid the duplicate page penalty ?
Any ideas ?
Is there still a duplication page penalty by the way ?