Spam, as defined in the context of computers, the Internet and electronic messaging, is a term used to designate unsolicited bulk electronic messaging and communication. In particular, spam is unsolicited bulk mailings that are commercially oriented. It is most commonly used in advertising, but it is also used to perpetrate religious, political or other types of messages. Spam is, often times, considered the electronic equivalent of junk postal mail, telemarketing or broadcast faxing. Spam got its bad name and reputation from the advertisement of ill reputable and questionable products, such as pornography, pyramid schemes, fad products, pump-and-dump stocks, etc.

Spam is delivered via several mediums, to include: