As part of the 2016 suite, this version introduced several advanced data tools that became standard:

Faster and more capable PivotTables, including the ability to automatically detect relationships between tables in your data model.

Here is a detailed write-up of the key features and context surrounding this specific version: 1. Key Update: 64-Bit Architecture

The 15.x series brought a UI that matched the Mac design language better than previous versions, including support for Retina displays and improved Mac gestures.

Following version 15.20.0, the 15.25 update continued improving right-to-left language support within Excel and other Office applications. 5. Final Status

This version 15.25.0 was critical for enabling a robust, professional Excel experience on Mac, bridging the gap between desktop functionality and the rising demand for cloud-based collaboration.