LINE Official Account can send various types of messages to users via two main messaging methods, reply messages and push messages:
| Reply messages | Reply messages are sent in response to user actions, such as LINE user is adding your LINE Official Account as a friend or initiating a message to your LINE Official Account. You have up to 1 minute to send a reply message without charge. Any subsequent messages after the first reply message or more than 1 min since the user's last user actions will be push messages. | 
| Push messages | There are several types of push messages: 
 Only push messages (one-to-one) are supported by the Conversation API. You can send a push message under one of the following conditions: 
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