The arrival of iOS 10.1 posed problems for some users of the health app. In concrete had people that not were capable of access to the data of the app and for solve this problem Apple just of launch iOS 10.1.1 for all them iPhone, iPad and iPod Touch compatible with the system operating.
In this case seems to update focuses solely on the mentioned problem with the app for health and, according to the company, is the only change from the previous version of the operating system, so it does not seem too urgent aktualizacji unless we are users of the app.

As usual, the update is already available through OTA and through iTunes.
If you choose the first method of update we have access to settings – General – software update and follow the steps on screen to update (is necessary to have at least 50% of the battery charge or have the device connected to the power supply and connected to a wireless network).
If we prefer to use iTunes to upgrade, we must connect the device to a computer with the latest version of the requested application and follow the instructions shows in display.
As mentioned does not seem an update too urgent, but of course it is always recommended to have installed the latest version to avoid potential security failures found in earlier versions and limit the possibility of attacks of any kind.