At Reddit, we use your email address to verify your account and (you guessed it) send you emails.
Verifying your account with an email address gives us a way to help you reset your password in case you forget it. If you don’t have an email address and you forget your password, you’ll be locked out of your account when you log out. (And that’s sad for all of us.) If you think you’ll forget your password, we highly recommend you verify your account.
Emails we send include email digests about top posts in your favorite communities, notifications when someone messages you, and administrative emails about your account. If you don’t want to receive emails from us, you can always unsubscribe from the email itself or update your notification settings.
If you have more questions that aren’t covered in these FAQs, check out r/help. Someone may have had the same question, or you can ask a new one and a Reddit administrator or one of your fellow redditors will help you out.