Your website may have some sensitive forms or inputs, such as personal or customer data. You can exclude any input box or entire form by adding a CSS class selector to this list. Only one class selector needs to match the element, no matter how many classes the element has applied.
If you add the class of a form, all fields within the form will be excluded. If an input is excluded, no data in the input box, including any placeholder or pre-populated data, will leave the end user’s browser.