Question

what is chain letters?​

Answer 1

Answer:

Chain letters are messages sent to a huge number of people, asking each recipient to forward them to as many other people as they can. While some of them can be amusing or sent for fun by the original sender, others may carry hidden threats to your internet security – viruses, phishing attempts etc.

Answer 2

Answer:

one of a sequence of letters, each recipient in the sequence being requested to send copies to a specific number of other people.