What is Difference between `msg.chat.id` and `msg.from.id` in Telegeram Bot?

What is Difference between msg.chat.id and msg.from.id in Telegeram Bot? Apparently, both are the same and Return user id.

bot.sendMessage(msg.chat.id, 'Hi', opts)

and

bot.sendMessage(msg.from.id, 'Hi', opts)

Solution

a chatId is a unique identifier for a chat, that can be either private, group, supergroup or channel whereas userId is a unique identifier for a user or bot only.

The only time the values can be the same is in a private chat.