From Microsoft site:

This update includes improvements to enhance the functionality of Windows 10.

Windows 10 updates are cumulative. Therefore, this package contains all previously released fixes. If you have previous updates installed, only the new fixes that are contained in this package will be downloaded and installed to your computer.

How to obtain and install the update

Important If you install a language pack after you install this security update, you must reinstall this security update. Therefore, we recommend that you install any language packs that you need before you install this security update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is available through Windows Update and will be downloaded and installed automatically.

Method 2: Microsoft Update Catalog

To obtain the stand-alone package for this update, go to the Microsoft Update Catalog website.