Google Play Music will now offer tunes based on where you are and what you do

If you don't mind Google knowing everything about your life, then there are some benefits to handing over your data to the big G.

The overhauled Google Music, which will launch this week on Android, iOS and on the web, will now offer streaming mixes based on your location and activity.

For example, if you're heading out to the gym, Google will assume you want your workout music of preference to play. On the other hand, if you're commuting to work, the service might soothe you with tunes you like to listen to on the subway.

Google's machine learning algorithms also take the weather into account, so you'll get a different set of tunes when it's raining than you would on a beautiful sunny day.

And if you're concerned about privacy, don't worry: the service is opt-in.

The new Google Play Music also has a revamped home screen, which recommends music based on all the contextual data mentioned above, as well as your listening habits. To deliver the experience, Google mixes machine learning with human curators, and it's likely to get better at guessing what you like over time.

For those moments when you're out of internet connectivity, Google will also always have an offline playlist handy, even if you don't download any music yourself.

Google's competitors such as Spotify and Apple Music also offer a music discovery feature, but Google's trove of data on user habits promises more precision when it comes to matching your mood, location and activity.

Google says the new Play Music will start to roll out in 62 countries this week. For a full list of the markets where the service (and other Google digital content services) is available, go here.