What should be done by ‘script’ command in UNIX system?

‘script’ command creates a script of your session input and output. By using the ‘script’ command,
you can capture all the data transmission from and to your terminal screen until you exit the script program.
Syntax--
     script [-a] [file] <. . .> exit
Common Options
     -a    append the output to file typescript is the name of the default file used by script. You must remember to type exit to end your script session and close your typescript file.