Hello 
everyone  I am here with a new post. In this post we will learn 
about how to add Firebase In-App Messaging service in your application this is a 
new way like there are so many tutorials available but this is new 2018 
way with updated dependency so let’s start…
so what is the use of firebase In-App Messaging service?
so what is the use of firebase In-App Messaging service?
Firebase In-App Messaging helps you engage users who are actively using your app by sending them targeted and contextual messages that nudge them to complete key in-app actions - like beating a game level, buying an item, or subscribing to content.
Now lets start the implementation:- 
But Actually....
For your convenience Here is a twistš
 we don’t 
need to write any code for use this feature. We just need to add one 
dependency and boom! All the work will be done add the bellow line to 
the app level gradle file and sync the project.
