Also known as
keyphrase, key phrase, passphrase, pass phrase, identifier, short code word identifier, prefix, suffix
A word or name used to distinguish a targeted message within a Short Code Service.
A Keyword is the first word that someone sends via SMS to the short code number. This word is then matched to your account and processed accordingly.
As a general rule we say to keep these short as most users don't like typing lots of characters into their phone.