@Sallie-Mitchell Hi Sallie - good question. My opinion, but I think the biggest question is whether to use a custom field in the first place. Generally speaking, a custom field is appropriate if:You intend to use the same value (text, file upload, html code) in more than one place. E.g. If you put your custom field “Wifi Password” in your booking confirmation email and your welcome email. You want a different value to show up for each property - either in an email or on your website. E.g. You have a custom field “Property Video Tour” you want to show up for each property page on your multi-property website; you have 5 properties but you want one welcome email template that has the custom field “Wifi Password”.
Also, for those wanting a few reference points:Tutorial for setting up custom fields (and where they can be used). Overview for using message/email templates Overview for setting up automation