autocomplete= attribute of the input element. Setting this attribute aims to prevent some browsers (particularly Chrome) from providing a clashing autofill overlay.
The best practice for this attribute breaks over time (see https://stackoverflow.com/questions/15738259/disabling-chrome-autofill) and is specific to different forms. If you are observing Chrome's autofill clashing on your form, update this attribute to the best practice du jour.
Defaults to "none".