A group in the Telegram on Android is where you can group chat with friends and contacts (who are the members). To add a contact to a group in Telegram do as follows:
1. Open the Telegram application on your Android device2. Tap the group you want to add more participants to3. Now, tap the group’s name on the top of the screen and there you should see the list of current members4. Scroll down, and at the end of the list, tap the Add member option5. Select the contacts to be joined to the group
Click for more Telegram Tips and Tricks