Which IBM Watson service can help retailers assist their customers in comparing multiple product features?

The service that is effective for retailers in helping customers compare multiple product features is Tradeoff Analytics. This service is designed to facilitate decision-making by analyzing different characteristics of various products or services, allowing users to weigh the pros and cons of each option. It provides insights into how trade-offs between features can impact a customer's decision, thereby assisting in making more informed choices.

Tradeoff Analytics empowers retailers to present complex information in a user-friendly way, making it easier for customers to understand and compare the features important to them. By employing this service, retailers can enhance customer satisfaction and potentially increase sales by tailoring recommendations based on feature comparisons that matter most to the shopper.

The other services mentioned, while valuable in their own contexts, do not specifically address the need to compare product features in the same manner as Tradeoff Analytics. For instance, Natural Language Understanding focuses on parsing and comprehending text data, Personality Insights analyzes user traits based on their input, and Discovery focuses on uncovering insights from data sources rather than directly facilitating feature comparisons.