This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.
We strongly recommend you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). Installing servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft security fixes. For general information on SSUs, please see the following articles: