By February 2018, Office 2013 was in its phase. Updates during this period focused almost exclusively on security vulnerabilities and critical bug fixes.
, specifically including updates through February 2018, represents a critical stability baseline for this version of the suite. Summary of Service Pack 1 (KB2817430) Office 2013 Professional Plus SP1 Feb 2018 Down...
A specific update from January 2, 2018 (KB3172510), improved the thesaurus and general stability across all Office products. Installation & Troubleshooting Description of Microsoft Office 2013 Service Pack 1 (SP1) By February 2018, Office 2013 was in its phase
Updates from early 2018 addressed vulnerabilities that could allow remote code execution if a user opened a malicious file. Summary of Service Pack 1 (KB2817430) A specific
Support for task pane and content apps in Outlook and PowerPoint via new APIs.
Service Pack 1 is a cumulative roll-up of all security and performance updates released prior to its publication, as well as specific improvements for modern systems.
Improved performance on high-DPI devices and precision touchpads.