By default the validation widget is disabled in your account.
To activate your validation widget go to 'Settings' of your dashboard.

Under 'Menu' you will see Validation widget & app. Turn it on and it will be visible on your left menu of your dashboard.

You find more information about how the validattion widget & app works by clicking on this link:
http://clearline.crunch.help/how-works-your-validation-widget-app