Telegram groups can have up to 200,000 members each and are extremely powerful communication tools. Telegram groups are ideal for sharing stuff with friends and family or collaboration in small teams. But groups can also grow very large and support communities of up to 200,000 members. You can make any group public, toggle persistent history to control whether or not new members have access to earlier messages, and appoint administrators with granular privileges. You can also pin important messages to the top of the screen so that all members can see them, including those who have just joined.