Signed-in users can also find this guide, with screenshots, under Help in the app.
Until your email address is confirmed, a blue bar at the top of every page says Please confirm your email address. Confirming takes one click.
If you don't have a confirmation email, select Send confirmation email in the blue bar at the top of the page. It changes to Email sent.
Open the email and select the link. The Confirm email page opens.
Select Confirm my email. You see Your email address is confirmed.
Select Continue to go to your Dashboard.