Google, as it announced it in the Google I/O 2015, has started rolling out the offline navigation and search feature in its new Maps update. With that, when the new update will reach you, you’ll be able to save a geographical area to navigate without going online.
All you gotta do to use this feature is search for the place or area you want to have offline and then just press the download button to save it for offline usage. You can also navigate when using the offline map, it’ll show “turn-by-turn” directions as being said.
The update will firstly reach Android users and Google will also improve and add more features in the near future.