What is Clickjacking?

Clickjacking is a malicious hacker tool that is used to deceive web users into revealing their information. It is a specific code or embedded script that without the user's knowledge performs an action that is by nature malicious. An example is when a user clicks a button to submit information, it instead sends the information to a database for the hacker to use at his convenience as well as sending in the information to the correct source. The user has no idea what has occurred, thus he has been hijacked.