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When you like or share a post in your newsfeed, you're sending a linkback to the original post. So, if your newsfeed is public "to everyone" Google is able to
by nico-roddz 14y ago
When you like or share a post in your newsfeed, you're sending a linkback to the original post.
So, if your newsfeed is public "to everyone" Google is able to crawl and index the content on it (discard the original post privacy settings)