Min Server Memory in SQL Server refers to the minimum amount of memory that the SQL Server Buffer Pool can allocate. It ensures that a certain amount of memory is always available to SQL Server, preventing the operating system from reclaiming memory that SQL Server needs to operate efficiently. Setting an appropriate Min Server Memory value is crucial for maintaining optimal performance and preventing memory-related issues. By configuring Min Server Memory correctly, you can ensure that SQL Server has the necessary resources to handle its workload effectively, especially during peak usage times.