This article shows you how to start a group chat in Snapchat for Android or iOS.
How to Create a Group Chat on Snapchat
Some aspects of a Snapchat Group Chat are similar to a text group chat. Send inside jokes, directions, and any other information you can all relate to. Snapchat's Group Chat has additional functionality, allowing you to make phone calls and start video chats with your group.
Open Snapchat and select the Chat tab (looks like a speech bubble).
Select the Compose icon (looks like a pen and pad).