Businesses seeking to notify customers of a new product may advertise or do promotions using a broadcast channel.
Once you have a Thing Speak Channel you publish data to the channel, have Thing Speak process the data, then have your application retrieve the data.
TV, radio and loud speakers all fall within the broadcast media communication channel.
These types of media should be used when addressing a mass audience.
This is the best channel to use for complex or emotionally charged messages, because it allows for interaction between speaker and recipients to clarify ambiguity.
A speaker can evaluate whether an audience has received his message as intended and ask or answer follow-up questions.