What Is A .bat File?

A batch file is a text file containing a series of commands intended to be executed by the command interpreter. When a batch file is run, the shell program (usually  cmd.exe) reads the file and executes its commands, normally line-by-line. Batch files are useful for running a sequence of executables automatically and are often used by system administrators to automate tedious processes.

For example, i use a .bat file to copy files from one folder on my PC to another folder, useful for backing up things.