Telegram and Whatsapp

 1/ Group or channel on Telegram 

       The difference between channels and groups

     https://www.indiatoday.in/information/story/what-is-the-difference-between-telegram-channel-and-telegram-group-1850196-2021-09-07 

 

2/ How to send a message from Telegram chat bot to the channel

'''
https://stackoverflow.com/questions/33126743/how-do-i-add-my-bot-to-a-channel
  This is how I've added a bot to my channel and set up notifications:

    1 Make sure the channel is public (you can set it private later)
    2 Add administrators > Type the bot username and make it administrator
    3 Your bot will join your channel
    4 set a channel id by setting the channel url like

telegram.me/whateverIWantAndAvailable

the channel id will be @whateverIWantAndAvailable

Now set up your bot to send notifications by pusshing the messages here:

https://api.telegram.org/botTOKENOFTHEBOT/sendMessage?chat_id=@whateverIWantAndAvailable&text=Test

the message which bot will notify is: Test

I strongly suggest an urlencode of the message like

https://api.telegram.org/botTOKENOFTHEBOT/sendMessage?chat_id=@whateverIWantAndAvailable&text=Testing%20if%20this%20works
'''