Form Tags in Contact Form 7 (CF7) (in the Form Tab) are used to define all CF7 form fields. Each Form TagForm Tag Form Tags in Contact Form 7 (CF7) (in the Form Tab) are used to define all CF7 form fields. Each Form Tag is replaced with an HTML element, which represents an input field, when it is displayed in an actual form. is replaced with an HTML element, which represents an input field, when it is displayed in an actual form.