I understand what happens if I select 'Never' or 'Always', but I do not understand the 'Auto' setting, it seems to be very similar to 'Always'. Thanks for any help & explanations!
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Auto is based on a HubPages algorithm that learns what you like and tries to send you good stuff that you'll like getting. So, you won't get every possible notification, which you will with "always".
I personally use a mix of the three.
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