It depends on the type of text campaign you are launching. At a minimum, the HELP keyword must return the text program name and further information about how to contact service providers.
Example for recurring messages:
2sms text alert. For info visit http://2sms.com/shortcode or call 1-877-276-7266. Msg&Data Rates May Aply. Msg frq 4/yr. Reply STOP to cancel
For more information on how to build visit our educational slideshow.
Please contact us at 1-877-276-7266 or email us at email@example.com for your specific business requirements.