While viewing the analytics of a single day on the behavior tab of AdWords, the new default view is hourly as opposed to daily. The option has always been available, so this isn't a large change. This default view is only set if the user is trying to view four or less days. If five or more days are selected, it will default to a daily view. This change is convenient for users of the feature and points out that it exists to the users who didn't know about it.