It is not a concept of the present era, in fact, it has been into existence for years for now.
Before the invention of the Internet and even before it became popular; people used only text messages as a medium of conversation with the other people.
But with the advent of technology, as soon as the internet became popular; people shifted their focus from SMS to emails and other social networking platforms.
Yes, you read that right.
These texting apps are majorly used by those organizations which use Salesforce to manage their huge databases.
As we all know that, earlier emails were used for the same but now the industries have been shifting their focus from other methods of marketing campaigns to texting.