Google announced Google Assistant today at Google I/O 2016. The product takes what Google's learned with its voice-activated search and information services (such as Google Now), and fleshes them out with a new digital assistant offering.
The new Google Assistant will live within the main Google Search for desktop and the Google Search apps for iOS and Android, as well as a new physical speaker product called Google Home, and can be activated by clicking the microphone icon.
Using context based on your location and what you've already asked, the Google Assistant is able to bring users the answers they need. The assistant arrives with an updated voice from the older Google voice assistant.
Google CEO Sundar Pichai showed off an example of using the product by asking "what's playing tonight," and having a back and forth conversation with the assistant.