Speech:
For each UI widget you can also specify a customized speech response
Location
Reply with a location-based on longitude, latitude coordinates
Buttons
Send a list of max 4 buttons. These buttons can either be used to open URLs, send messages, or even trigger events
Card
A card is a rich UI element that allows you to send an image, title, subtitle and buttons to a user.
Carousel
The Carousel widget is a collection of Card widgets. You are limited to 10 Cards for a Carousel.
Read more on each of the components: