What command would you use to get comprehensive documentation about any command in Linux?

The help builtin only provides brief usage information for bash shell builtins, not comprehensive documentation for all commands.

echo outputs text or variable values to standard output and has no documentation lookup functionality.

locate searches the filesystem for files by name and is unrelated to command documentation.

The man command reads structured manual pages (man pages) stored on the system, providing detailed documentation including synopsis, description, options, and examples for virtually any installed command or system call. It is the canonical tool for comprehensive command documentation on Linux and other Unix-like systems.

get is not a standard Linux command for documentation - it does not exist as a documentation utility.