ELI5: Explain Like I'm 5

Wildcard character

A wildcard character is a character like an asterisk (*) or question mark (?) that stands for any other character. For example, if there are five files in a folder and you wanted to delete only three of them, you could use a wildcard character to tell the computer to delete all of the files that match the pattern you define. For example, if you had the files apple.txt, banana.txt, orange.txt, pear.txt and peach.txt, you could use the wildcard character * to tell the computer to delete all the .txt files. You would type the command like this: "delete *.txt". This command would delete the three files ending in .txt, but leave any other types of files untouched.