respond.io uses custom Dialogflow parameters to enhance the application's functions to cater to multiple use cases.
In Dialogflow, parameters are generally used to connect words and phrases in a user’s response to entities. So if someone says "My birthday is on March 13," the phrase "March 13" will be automatically detected and treated as a date entity. You can read more about parameters in Dialogflow on their documentation page.
Opens or closes a Conversation for a contact. This is useful for support. Opens a conversation for contact who are still expecting something, while closing a conversation signifies contacts who have been attended to.