The mass changes option in Employee Central allows HR administrators to make updates to multiple employee records at once, rather than having to update each record individually. This feature can save time and increase efficiency for HR tasks such as updating job information, compensation, or personal information.

Some of the common mass changes that can be made in Employee Central include:

1. Job changes - HR administrators can update job titles, job codes, and other job-related information for multiple employees at once.

2. Compensation changes - With mass changes, administrators can update salary, hourly rates, bonuses, and other compensation-related information for multiple employees.

3. Personal information changes - This includes updates to employee contact information, emergency contacts, and other personal details.

4. Manager changes - HR administrators can update manager information for multiple employees at once, including assigning new managers or updating reporting relationships.

5. Time off updates - Administrators can update time off balances, accrual rates, and other time off-related information for multiple employees.

Overall, the mass changes option in Employee Central provides a powerful tool for HR administrators to streamline HR tasks and improve efficiency in managing employee records.