Spam refers to the use of electronic messaging systems to send out unrequested or unwanted messages in bulk.
The difficulty with stopping spam is that the economics of it are so compelling. While most would agree that spamming is unethical, the cost of delivering a message via spam is next to nothing. If even a tiny percentage of targets respond, a spam campaign can be successful economically.
Ref:- Computer Dictionary
Prepared by :- Hibatullah Jouhar