Final answer:
The purpose of the login ID is identification. It helps in distinguishing one user from another and associating their actions with their account.
Step-by-step explanation:
The purpose of the login ID is Identification. The login ID is a unique identifier assigned to each user, allowing the system to distinguish one user from another. It helps in identifying the user and associating their actions with their account.
For example, imagine a scenario where multiple users have access to an online platform. Without login IDs, it would be difficult to determine who performed a specific action or track each user's progress and activities.
Therefore, the login ID plays a crucial role in identifying users within a system while ensuring privacy and security.