Burst Mode, an iPhone 5s feature, is designed to capture 10 photos per second while the camera capture button is held down, which is useful for getting shots of moving targets but uses up quite a bit of storage space.
Before iOS 7.0.2, Burst Mode asked users to save favorite shots but did not delete the whole roll of photos, while after iOS 7.0.2, users are prompted to choose to save just their favorites and given the option to delete the rest of the photos by tapping a button. This is a useful addition that saves Burst Mode users from having to manually delete multiple photos, a time consuming process.
While iOS now offers to delete photos not saved to favorites after a Burst Mode capture, users can also elect to save the entire line of shots. iPhone 5s users should already have iOS 7.0.2 as it was released in September via an over-the-air update. Apple has also released iOS 7.0.3, which includes iCloud Keychain, new motion reduction options, and a fix for an accelerometer issue.