Google Chief Executive Sundar Pichai revealed new products and services that use smarter software to make decisions rather than follow instructions, part of a major push into artificial intelligence that he said would define the tech giant over the next decade.

Google, a unit of Alphabet Inc., said it would soon start selling a device called Home that will answer users questions and complete tasks for them, like scheduling appointments, playing music and sending emails.

We think of it as a conversational assistant, Mr. Pichai told attendees at Google s annual developers conference, held at an outdoor concert venue near its Mountain View, Calif., headquarters.

Google also said it would launch a new messaging app, called Allo, that would incorporate some of the same underlying technology as Home to create smarter conversations.

Google has invested heavily in artificial intelligence in recent years to strengthen its existing products and spawn new ones.

Researchers increasingly use one branch of artificial intelligence, called machine learning, to enable computers to teach themselves new skills by reviewing huge data sets.

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