What are the wild character in unix?

In Unix, wildcards are special characters used in command-line operations to represent one or more characters in file names or strings. The most common wildcards are the asterisk *, which matches zero or more characters, and the question mark ?, which matches exactly one character. Additionally, square brackets [] can be used to specify a range or set of characters to match. These wildcards facilitate file manipulation and searching by allowing users to refer to groups of files or patterns without needing to specify each file name explicitly.