What can you do with Telegram?

ABOUT
https://telegram.org/faq

BLOG
https://telegram.org/blog

APPS
https://telegram.org/apps

PLATFORM
https://core.telegram.org/

TWITTER
https://twitter.com/telegram

FAQ
Telegram FAQ

This FAQ provides answers to basic questions about Telegram.
Check out our Advanced FAQ for more technical information
https://core.telegram.org/techfaq

General
https://telegram.org/faq#q-what-is-telegram-what-do-i-do-here
https://telegram.org/faq#q-what-is-telegram-what-do-i-do-here

What is Telegram?
Who is it for?
How is it different from WhatsApp?
How old is Telegram?
Is it available on my device?
Who are the people behind Telegram?
Where is Telegram based?
How do you make money?
What are your thoughts on internet privacy?
Do you process takedown requests?
Do you process data requests?

Telegram Basics
https://telegram.org/faq#q-who-can-i-write-to

Who can I message?
Who has Telegram?
Inviting friendsWhat do the green checks mean in Telegram?
Can I hide my ‘last seen’?
Who can see me ‘online’?
Voice callsUsing emoticons on iOS

Groups, Supergroups, and Channels
https://telegram.org/faq#q-what-makes-telegram-groups-cool

What makes Telegram groups cool?
How are they all different?
Creating a groupAdding members and using Invite Links

Usernames and t.me
https://telegram.org/faq#q-what-are-usernames-how-do-i-get-one

What are usernames?
How do I get one?
How does t.me work?
What can I use as my username?
Do I need a username?
Will people know my number?
How do I delete my username?
What do I do if my username is taken?

Bots
https://telegram.org/faq#q-how-do-i-create-a-bot

How do I create a bot?
How do I get rid of a bot?
Are bots safe?
Where can I get more bots?

Security
https://telegram.org/faq#q-how-secure-is-telegram

How secure is Telegram?
How do you encrypt data?
Why should I trust you?
Do I need to trust Telegram for it to be secure?
What if my hacker friend doubts you?
Can Telegram protect me against everything?
How does 2-Step Verification work?

Secret Chats
https://telegram.org/faq#q-how-are-secret-chats-different

What is a secret chat?
Starting a secret chatUsing the self-destruct timerScreenshot alertsEncryption key pictureWhy not make all chats ‘secret’?

Deeper Questions
https://telegram.org/faq#q-why-not-open-source-everything

Why not open source everything?
Can I use my own server?
Can I use the Telegram API?
Do you have a Privacy Policy?
Why do you have two apps in the Mac App store?
Can I translate Telegram?
Can I help?

Your Account
https://telegram.org/faq#q-how-do-i-log-out

Logging outChanging your phone numberDeleting a Telegram accountHow does account self-destruction work?
My phone was stolen. What do I do?