Matching wildcards

Matching wildcards are like instructions (or rules) that tell computers how to find certain kinds of information. For example, let's say you want your computer to find a website about dogs. You can use a wildcard rule that tells your computer to look for websites that have the word "dog" or "dogs" in the title: so if your wildcard rule was '*dog*' it would find websites titled "Loving Dogs", "Famous Dog Breeds" and "Dog Training".