The document discusses the new features and improvements in versions 8.0 through 8.5 of Jira Software. Key highlights include a new Lucene search engine making Jira 20x faster, improved email notifications, priority icon updates, and the introduction of a mobile app. Upgrades from 7.0 to 8.0 include a customized pre-upgrade planning page. Feature releases like 8.1 add support for Java 11 and SQL Server 2017. The Jira 8.5 enterprise release will target Q4 2019 and include backported security updates.