Hi basiccly its a simple messaging protocol that for example google uses for push notification.
You have many cheap devices which offer MQTT funcionality.
ill give you an example:
We host MQTT server which gathers data from your main MQTT sensor :
Example : you are sending temperature value of your living room to our platform
and data is writen like topic/sensor value -----------------------> living_room/sensor_1
you can then use platform to notify you in case of temp treshold reached etc...
best part iof the mqtt that you can subscribe to the topic with any mqtt supported client (hardware software etc.. )
so bassicly you could say if my tem in living room reaches 25 degrees turn on A/C and send me an sms
there are many cases u could use that.
We are mainly targeting Server rooms monitoring, CO, Air quality etc....
if you need additional info im here to help
regards
Grega