There can be various use cases for hidden fields:
- get a hold of GET parameters in the URL to save more information on the supporter in your webform results.
- hide form fields that get pre-filled anyway, to get an even better user experience.
Warning: Further hidden field settings are available under the URL
yourCampaignionURL.org/node/11/webform/components. Please note that the purple bits need changing to match the form in question.
In particular, if you need to pre-populate a hidden field or use it in relation with conditionals, you need to access the field settings from the previous URL to change its display settings from "
Secure value" to "
Hidden element". A more detailed description of this change in available here.