How to Start using Shazam to identify Music/TV

Shazam is the app that allows you to identify music hear on Radio

Shazam is an awesome app that allows you to identify music
and TV around you. Once the app is launched you can touch the
shazam button to identify, explore, buy and share the tracks you
want.
Once you identify a song with shazam you can buy it on
Amazon, Google play or iTunes if you are on iOS, shazam also
gives you info on the song you are listening too alongside
lyrics, after that Shazam also allows you to share what you
have explored across social media network like Facebook,
twitter, Whatsapp, Google+ and Pinterest.
You can also watch the music videos on YouTube and use Rdio,
Spotify and Deezer to listen to full tracks. You can also create
and manage playlist of your Shazamed tracks with Rdio.
Shazam can also work with your TV to quickly identify movies
and TV shows so you can watch again and share with your
friends.
You can also visit shazam to see your entire Shazamed history,
sign in to facebook to start exploring and know what your
friends have shazamed, Shazam is totally a free app you can
use as much as you like.
Shazam supports http://aspiredtech.net/2014/12/30/start-using-shazam-identify-musictv/

I have never heard of this app until nov 2019

That shazam app is a very nice app. I've known lots of songs and artists through it