Microsoft Office 2019 Professional Plus is a suite of office programs developed by Microsoft, which includes applications such as Word, Excel, PowerPoint, Outlook, Publisher, Access, and OneNote. These are used for creating, editing, and sharing documents, presentations, planning, and databases. The benefits that come from purchasing a Microsoft Office 2019 Professional Plus license include:

1. Improved interface: The user interface has been updated to be easier to use and more intuitive.
2. Enhanced features for Excel: Excel now offers new and improved functions, such as Treemap Charts and DAX Functions, which make data analysis easier.
3. Improved presentations: PowerPoint now offers more animation options and effects, as well as the ability to create presentations in 4K format.
4. Easy sharing: Office 2019 Professional Plus allows document sharing and collaboration with others through OneDrive or SharePoint.
5. Enhanced security: Office 2019 offers a high level of security through document encryption and protection against cyber threats.

These are just a few of the features of Microsoft Office 2019 Professional Plus, and the list can go on. This office program package offers a wide range of functionalities that make work easier and more efficient.