Email address verification is for everyone's protection. Verifying your email address enables Clickability Inc. to confirm that you're the person you claimed to be during registration. It also helps prevent someone from using your email address to forge an account.
In addition, email address verification lets the people you send links or folders to know that you're actually the person sharing the information. If you receive an email message from a SAVE THIS or EMAIL THIS user who hasn't verified their email address, the message will alert you to this fact.