An SMS Shortcode is a short text number e.g. 82228 which are specifically designed for inbound SMS campaigns and lead generation. The SMS Shortcode is designed to be easier to read and remember than long numbers as the short number looks cleaner and is easier for the customers to text.
SMS Shortcodes are generally shared as the cost for a unique number can be quite high. Keywords can be rented off the SMS Shortcode allowing multiple people to have access to the SMS Shortcode at a shared cost.