How do I turn off notifications when someone likes something? I don't care if something is liked. It's worthless information and a waste of my time. I only care if someone responds to me or mentions me. I looked at the notification page but saw no option for turning off likes.
There is no way to do this at the moment. Don't know if Facebook have any plan to implement this feature in the near future.
Learn more about how to adjust notification.
Here is a Chrome extension to Hide Likes on Facebook Notifications. You can give it a try at your own risks.
Note: I have never used this extension.