The following video shows you how to pull data from Infusionsoft fields and to print default values if the data doesn't exist.
Here is an example of a shortcode with 2 sets of the square brackets "[" and the "]" stripped out.
i4w_m_default myid='' field='' default=''
i4w_m_default myid='i4w_db_Id' field='City' default='my-default-value'
You are selecting an Id to lookup, a field to pull and a default if that field is blank within Infusionsoft.
myid: the Id of the record in Infusionsoft you'd like to grab ie: i4w_db_Id or i4w_db_Referral_ContactId
field: the name of the date field in Infusionsoft you'd like to grab ie: _AffiliateWebsite3 or City
default: the default value you'd like to appear in case the field in Infusionsoft is blank.ie: universal value or No City