Basically, for those who tend to keep track of such beta builds from Apple, they will be able to see how Apple has done a pretty decent job in ensuring that whatever bugs that can be found would be squashed, and iOS 9.3.2 happens to be a fair representation of the culmination of what Apple’s software engineers have been working on all along.
There are fixes made concerning Japanese text entry, resolving a Bluetooth audio bug associated with the new iPhone SE, improvements introduced for businesses that made use of mobile device management setups, Apple’s adjustment to the new Night Shift mode which enables it to work even when your handset has entered the Low Power mode. Of course, iOS 9.3.2 is not alone in its release, as it is accompanied by its ‘family members’, OS X 10.11.5, watchOS 2.2.1, and tvOS 9.2.1.