Announced at Google I/O 2016, Google Assistant is most important tool in Google's AI library. While Google has been using voice search for years, Assistant builds upon a familiar platform in a whole new way, helping to better assist users in getting things done every day. Google Assistant is an ongoing two-way conversation that provides you with answers and information to whatever you may ask of it.
For example, you can ask "Who is the coach of the Boston Celtics?" and then followup with "How old is he?", and Assistant will know the context of the conversation, without you having to specify who "he" is.