What is the purpose of the `time` command?

The time command in Linux is used to measure and analyze the execution time of commands and scripts. It provides three key metrics:

1. Real Time: The total elapsed time from start to finish of the command.
2. User Time: The amount of CPU time spent in user mode (executing the command).
3. System Time: The amount of CPU time spent in kernel mode (system calls).

Using the time command helps identify performance bottlenecks, optimize code, and make informed decisions about resource allocation.