An SMS Keyword is a word that consumers text to a 5 or 6 digit Short Code (or Long Code) using their mobile phone.
An example is text “High5” to 55678 to learn more about business services that are provided by Mobile High 5. Think of a keyword as your campaign word.
The Keyword is the mechanism for interaction with the business or brand associated with a Short Code for a mobile messaging or mobile marketing campaign. Processing using SMS is quite simple: Once a keyword is sent to a shortcode for the first time for that customer, the customer initializes the opt-in process. An automatic response is typically triggered to provide the sender with a specific message, link, etc. such as to confirm their desire to opt-in.
Once the opt-in process is completed, the customer may receive future messages. Opt-in may not be required for certain service or transactional messages. Keywords can also be used in the exactly same manner for Long Codes!