What are subscriptions

Many articles and topics have a subscription button. Clicking this button adds the topic to your personal subscriptions, which means any time there is a change or addition to that topic you will receive a notification by email. This is similar to how Facebook messaging dings your phone, but not nearly as annoying because you can control notifications in your preferences. Look for subscription options in your account page and you will see that you can choose to be notified or not, or to receive a summary digest. The digest can be set to only once a day or once a week instead of for every single time something is updated. For less time-sensitive things this is a more sane way of handling notifications. All notifications regardless of type or frequency, are sent to the email address you provide in your user account profile.