https://play.google.com/store/apps/details?id=com.google.android.talk&hl=es
is a unified communications service that enables text, voice, or video chats, either one-on-one or in a group. Hangouts is built into Google+, Gmail, YouTube, and Google Voice, plus there’s Hangouts apps for iOS, Android, and the web. It’s essentially a useful and cost-effective collaboration platform for the average person as well as enterprise customers.
How has Google Hangouts changed?
Hangouts Meet
Google has described Hangouts Meet as «a new video meeting experience with one goal: make joining meetings effortless». The company wanted to improve Hangouts to make it easier and faster for people start and join video conference. Hangouts Meet is designed to have a «light, fast interface and smart participant management». It even allows up to 30-person meetings.
Hangouts Chat
Hangouts Chat is «an intelligent communication app for teams that takes direct messaging in Hangouts and evolves it to reflect the way modern teams talk business,» according to Google. The idea behind it is that teams working on a project should be able to discuss tasks, share work, and more. So, Hangouts Chat offers virtual rooms with threaded conversations and integration with other Google products, like Drive.

How does Hangouts Meet work?
Video conferences
To start your meetings, you’ll simply share a link. There will be no accounts, plugins, downloads, or hassles required. People can click on this link from Google Calendar, an email invite, or an ad-hoc share. And if you’re dialing in from a conference room, your laptop, or a dedicated mobile app, Google said it will be «just a few clicks and you’re in», though it’s being vague on details right now