Use SMS Keywords to Opt-in your customers
SMS Keywords are short words made of letters and/or numbers that can be sent to a shortcode in order to trigger a response. Keywords normally trigger an opt-in flow, but can also be used as replies from customers who have already opted-in as a response to a question or poll. An MMS Keyword is when a mobile subscriber submits or replies with a picture in addition to a keyword.
Use SMS Keywords to promote your app
SMS Keywords can be used to promote a mobile application offline. When the customer submits the text keyword to a short code we can respond with a link to the app store.
Dedicated Shortcode Keywords vs Shared Shortcode Keywords
The number of SMS keywords allocated to your account depends on your messaging plan and your account type. If you have a dedicated shortcode, then you can create an unlimited number of keywords on your shortcode. If you use a shared shortcode, then you will be allocated a certain number of keywords based on your plan.