You must click the confirm link in the confirmation email to use many features of the site.
If you have not received your confirmation email, take the following steps:
1) Wait. It can take up to 24 hours for your confirmation email to be delivered.
2) Check your spam. Make sure Quizlet and email@example.com is not being blocked by your personal or school-wide spam filter.
3) Click "re-send confirmation link." Log in to your account, on the home page at the top of the screen is the link.
4) Change your email address. If you still haven’t received the email, try going to your Settings page and change your email address.