Final answer:
The unique identifier that Microsoft Project gives to each task is called the Task ID. It is sequentially assigned and helps in efficiently managing tasks by providing each with a unique, unchangeable number for easy reference.
Step-by-step explanation:
The unique identifier that Microsoft Project assigns to each task as you enter it is known as the Task ID. This function is important for tracking and managing tasks within the project. Each task that is created within the system is given a sequential number starting from 1 for the first task entered. This number is automatically generated by Microsoft Project and cannot be changed manually, ensuring that each task has a unique identifier for reference.
When managing a project, having a Task ID for each item allows the user to easily reference and locate specific tasks. This is particularly useful when dealing with large projects with multiple tasks. For example, if you need to update the status of Task 45, you can quickly find and select it based on its unique Task ID.