Push notifications were first introduced to smartphones by Apple with the Push Notification Service in 2009.[23] For Android devices, Google developed Android Cloud to Messaging or C2DM in 2010. Google replaced this service with Google Cloud Messaging in 2013.[24] Commonly referred to as GCM, Google Cloud Messaging served as C2DM's successor, making improvements to authentication and delivery, new API endpoints and messaging parameters, and the removal of limitations on API send-rates and message sizes. It is a message that pops up on a mobile device. It is the delivery of information from a software application to a computing device without any request from the client or the user. They look like SMS notifications but they are reached only the users who installed the app. The specifications vary for iOS and android users. SMS and push notifications can be part of a well-developed inbound mobile marketing strategy.
To learn how your message can be improved, it’s important to analyse the results. Which parts of your message are not performing as well as expected? Is the open rate lower than expected? Or are people opening your message, but not taking any further action based on the contents of the message? Your analysis will tell you which parts of your message can do better and will help you to formulate your goal.  
The only factor which remains consistent is "CHANGE" if we look into the existence of the world, it s gone through many changes, the needs of people havebeen changed with the journey of time, in early periods, and human existence only requires food and shelter. It is said, human upgraded to the smarter level as soon human knew how to light up the fire,We can say the earliest achievement was the fire. Human has developed its self with time, the invention of boards, the wheel, are one of the foundations which clearly declares the ultimate success toward modernism. The industrialization has changed the prospects of things; it boosted the standards of living. The basic benefit was that it worked for the assessability of goods to all classes of human society.
This question exists for many. First, NEVER EVER purchase a list of mobile numbers. (SMS/MMS) marketing is permission based, and ultimately you want a list of customers numbers who are genuinely interested in your product or service and are happy to receive your text message and are likely to buy your goods and service. Remember, you can turn customers off and possibly upset a lot of your potential customers when sending text messages on their mobile devices without their consent.