A more thorough explanation:

The Worker Adjustment and Retraining Notification Act (WARN Act) is a federal law that requires employers to give notice to their employees when there are mass layoffs or plant closures. This notice must be given at least 60 days before the layoffs or closures take place.

For example, if a company is planning to close a factory and lay off 100 workers, they must give those workers at least 60 days' notice before the closure. This gives the workers time to prepare for the loss of their jobs and to start looking for new employment.

The WARN Act applies to companies with 100 or more employees, and it is designed to protect workers from sudden job loss without warning. By giving workers advance notice of layoffs or closures, the law helps them to plan for the future and to minimize the impact of job loss on their lives.