Google on Thursday at its eighth I/O annual developers' conference, held at the Moscone Center in San Francisco, revealed the next version of Android operating system dubbed Android M.

The Android M developer preview was launched at Google I/O 2015 in San Francisco. Sundar Pichai, senior vice president of products at Google, introduced the conference and said that the company had "gone back to basics" with the new version of Android. While Android Lollipop introduced a brand new design and aesthetic, Android M is bringing some much-needed stability and usability improvements, which might not be as immediately arresting, but may prove to be significant long-term additions.

Take a Look on What's New Major Feature on Android M.

One of the biggest additions that Android M brings to the Android platform is the revamped app permissions. The company, as rumored previously, announced increased user control of app permissions in the M release. Android M also changes existing permissions system by breaking down user permissions into specific categories, and having apps ask the user for permission at the time access to a feature is required.

Google at I/O 2015 also revealed a new Chrome feature that will change the Web experience for Android users, called Chrome Custom Tabs. Instead of embedding a Web view in an app, developers can enable a Google Chrome overlay on top of the active app. This overlay or Custom Tab will give users the convenience of Chrome's power and security along with their saved settings and passwords. The feature will become available on a stable version of Chrome for Android sometime in Q3 2015.

Fingerprint scanning technology on smartphones has been around for some time; though has been limited until now to select OEMs and their individual implementations. Google with its Android M release wants it to change and has added fingerprint APIs for developers to add into their apps. Google believes that native fingerprint support enhances the Android Pay feature that will allow users to confirm the purchase with their fingerprint. Apart from Android Pay, the feature will allow users to sign-in or authenticate themselves on apps, as well as on websites via Google Chrome.

Android Pay is Google's new mobile payments system designed to make the checkout process easier and faster. Google is aiming to provide "simplicity, security, and choice," with Android Pay, allowing you to use your existing credit cards to pay for products in more than 700,000 stores in the US. Compatible with any device housing NFC capabilities (and running 4.4 KitKat or above), the Android Pay platform is being supported by American Express, Visa, Mastercard, and Discover, as well as carriers such as AT&T, Verizon and T-Mobile. Google's response to Apple pay is here.

The next improvement in the latest Android M release is intended towards handling Web links. This means Google wants its OS to easily handle links between apps with its Android M release. Until now, clicking a link within an app prompted a popup message asking user to open it within the app or to open it in a Web browser. Instead, with Android M, developers can have the operating system verify whether a link should open within an app or open via a new one. Google details that developers can add an autoVerify attribute to their app manifest so that users can be linked deep into the native app without any disambiguation prompt.

Every year we see Google coming up with a new feature in its latest Android release to improve upon battery usage. Last year it was Project Volta and this year Google is coming up with a new feature called Doze. The company believes that the new feature will make Android devices smart about managing power. With Android M release, the OS will realize via tracking motion detection whether the device has been left unattended for a while. Following this, Android will limit or 'exponentially' back off background activity of an app with the purpose of extending battery life. The best example of this can be the Twitter app which keeps on adding new tweets on top for the user to see only to use more data or Wi-Fi thus affecting the battery life. This will change with Android M.

With Android M, Google Now gets a major revamp with the Now on Tap feature. It brings a major overhaul to how Google can provide contextual information within an app itself. It works within any app and automatically searches the context present on the screen by just long pressing the home button.

Google is also bringing a new RAM manager that will offer more details about memory usage than just readouts for running apps. The new RAM manager in the Android M Developer Preview will be available in Settings > Apps. The manager will now show users how much memory recent apps are eating up and will rate them "good" and "average". Much like before, it will show individual app information. This new feature will let users recognise the most memory-hungry apps installed on the system and can help them to get rid of them.

The Android M Developer Preview also brings redesigned app drawer. With Android M, the app drawer along with widget picker will scroll vertically instead of sideways in previous generations. The colour design and icons looks similar to Android Lollipop.

With Android M, Google will also be bringing what may be one of the most useful features for users often migrating between devices or formatting their smartphones - auto backup and restore for app data. With Android M, users will get their all apps backed up automatically to Google Drive - specifically settings and app data less than 25MB in total. The company confirmed that the automatic backups will occur every 24 hours and will not count towards the user's personal Drive storage share. Interestingly, the data of the app is uploaded to the user's Google Drive account after encryption. The feature would allow people signing into their Google account on new Android devices, or on a device after a factory reset, to recover all their app settings and app data once they reinstall their apps and sign-in.

Google at I/O 2015 also announced that Android M will support USB Type-C ports. While this is great in terms of reversibility, and that with new Android devices with the port built-in users will never have to worry about which way their cable is facing, it also adds some other features. Since the standard allows for transfer of power, video, and audio in both directions, users can rely on just one port for their A/V needs, and, also charge other devices - this last was emphasized by Google at the announcement as well. With the new USB standard, users will also be able to charge their Android devices 3-5 times faster than earlier. Alongside, Android M will also get USB support for Midi devices.