What are the common applications of the linux file command?

Question

This command seems to be used less frequently.

Answer 1

I am a PHP programmer. I personally feel that this command is quite useful for checking the text encoding and line breaks of files. Sometimes I get frustrated by the encoding and line breaks in windows and linux systems

Answer 2

I use it to check the file type, and I can tell whether it is a 32-bit or 64-bit executable file.