A marketing associate needs to import data from a field called Is Opted In.

For a field called "Is Opted In" with data values of 1 or 0, the most appropriate data type is Boolean. Boolean data types are used to represent true/false values, often signified by 1 for true and 0 for false. This data type is ideal for fields that indicate a binary condition, such as whether a subscriber has opted in or out of receiving communications.