These are industry-standard opt out words automatically handled by Medallia Concierge:
STOP, STOPALL, UNSUBSCRIBE, CANCEL, END, and QUIT - will stop customers from receiving messages from your Medallia Concierge text number.
A message will not be sent to a subscriber that previously texted in any of those keywords until they re-subscribe to your Medallia Concierge phone number by texting one of the OPT-IN keywords below. Only single-word messages will trigger the block.
START, YES and UNSTOP will opt customers back in to the messages from your Medallia Concierge phone number
HELP and INFO will return a message informing the customer that they can use the above commands to control the delivery of messages.