Hello @PriscillaL484 ,
If you've added the SMS addon to your account, then you can make new SMS campaigns through the Create button on the campaigns or welcome page in your account.
See also:
Getting started with SMS (PDF download)
Registering your account for SMS
SMS marketing overview
SMS marketing best practices
SMS marketing while respecting quiet hours
Enabling SMS for landing page sign up forms
Importing SMS contacts list
... View more
