What does 1 green tick in Telegram mean?

Only one tick indicates that the message was transmitted to the Telegram cloud and that your buddy was alerted of the message's or your messages' transmission. Obviously if the person has the notification activated, otherwise he doesn't hear the notification, but he see the number of the messages received from you.

Can I create 2 Telegram accounts with same number?

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How can I find new movies in Telegram?

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How can I watch series for free?

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Can someone read my Telegram messages?

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Which Telegram channel has most subscribers?

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Where is Telegram data stored?

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