These messages should tell your SMS subscribers how they can easily stop all messages or request help.
Example of "Join" message:
Thank you for joining the %%COMPANY%% text message list. Reply %%KEYWORD%% HELP to learn more or %%KEYWORD%% STOP to stop all messages.
Example of "Help" message:
This keyword belongs to %%COMPANY%%. Reply %%KEYWORD%% STOP to stop messages from %%COMPANY%%. 10msg/mth.Std msg rates apply.
The item that is most important is the frequency.
It is also essential to explain the standard message and data rates. "Std msg/data rates apply" must be included on any marketing material.