Is it legal to post google images on your social media?

I mean many of us download google images and add it for our posts/MyTakes/questions. Is this even legal? Can GaG get into trouble for allowing such posts?
Updates
+1 y
What happened if you disown/delete these questions/posts/myTakes?
Updates
+1 y
What happened if you disavow/delete these questions/posts/myTakes? **** Does disavowning posts or deleting your account protects you from lawsuits?
Is it legal to post google images on your social media?
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