What type of field is best to track changes in product prices over time?

Tracking changes in product prices over time requires a field that can capture and store historical data, allowing you to see the price at different points in time. A manual-entry field with snapshot property enabled is specifically designed for this purpose. When this property is enabled, the manual-entry field can take a snapshot of the value at a specific time whenever you make an update, effectively creating a historical record.

This functionality is critical in scenarios where you need to reference how prices have changed, as it allows for easy reporting and analysis of historical price data. The snapshot property ensures that each change is preserved rather than overwritten, which is vital for trends analysis and historical reporting.

Other types of fields, such as summary fields or formula fields, do not provide the ability to track changes directly. A summary field typically aggregates data from related records, which does not help in capturing historical price changes. Similarly, a formula field evaluates data dynamically and does not store historical changes either; it reflects the current value based on existing data. A lookup field serves as a reference to data in another table, but it also does not hold historical data unless combined with other strategies. Hence, the manual-entry field with snapshot property enabled is the ideal choice for tracking product price changes over time.