What should you do to track previous employment information for workers?

To effectively track previous employment information for workers, creating a free-form content type without a content item is the most appropriate approach. This method allows for flexibility in capturing various types of employment history, which can be diverse and not always fit standardized formats.

By using a free-form content type, the system enables users to input unique data tailored to specific job roles and experiences that might not have predefined categories or structures. This versatility means that each worker's previous employment can be documented in a way that accurately reflects their individual background, leading to a clearer understanding of their prior experiences and skills.

The absence of a content item in this scenario suggests that users can input data in a more open-ended manner, without being restricted to a specific template, accommodating various job titles, companies, and employment conditions that may not conform to traditional datasets. This approach enhances the granularity and richness of the employment history data collected, making it more useful for analysis and record-keeping.