Logic and Conditional Fields are highly requested by our customers. Conditional fields and business logic are needed in the Dynamic 365 Marketing module because they allow businesses to tailor the information they collect and the actions they take based on specific conditions. For example, a business may want to only show certain fields on a form if a customer indicates that they are interested in a specific product or service. This can help businesses to gather more relevant and accurate information from their customers, and to tailor their marketing efforts to better meet the needs of their audience. Additionally, conditional fields and business logic can help businesses to automate certain processes, such as sending follow-up emails or triggering specific actions based on a customer's response to a marketing campaign. This can help businesses to save time and to streamline their marketing efforts.