Subscriptions let you get email updates whenever new content appears in an area of the community that you're interested in. You can subscribe to a board, a blog, category or a label. You can also subscribe to a specific post.
To subscribe a piece of content:
Go to the board or thread you want to subscribe to.
To subscribe to a location, click (Location) Options > Subscribe. To subscribe to a specific post, go to the post and click (Post) Options > Subscribe
To view and manage your subscriptions:
Go to My Settings > Subscriptions & Notifications.
Click My Subscriptions to see a list of the items you've subscribed to You can click a subscription to go to the item.
This also allows you to manage the frequency at which you receive them
To delete a subscription, click the check box for the subscription and click Email Subscription Options > Delete Selected Subscriptions.