Voice broadcasting is a mass communication technique, that broadcasts telephone messages to hundreds or thousands of call recipients at once. This technology has both commercial and community applications. Voice broadcast users can contact targets almost immediately.
SMS broadcasts offer the capability of contacting hundreds to thousands of people via text messaging. Unlike traditional voice broadcasts, a text message is a brief message that gets right to the point and can be instantly read by the recipient.
Email marketing is the act of sending a commercial message, typically to a group of people, using email. In its broadest sense, every email sent to a potential or current customer could be considered email marketing.