This option gives you explicit privilege to download only the updates you want. If you want the updates to start downloading only when you approve the updates, select the checkbox against Download update files to this server only when updates are approved. On Update Files tab, make sure that the Store update files locally on this server radio button is selected. Click Update Files and Languages option.This option does not make any sense of deploying the WSUS server in organization if every client computer is supposed to download updates from internet. You will need to make sure your client computers have direct access to Microsoft Update in this scenario. In this scenario, the update files come directly from Microsoft Update and are downloaded at the time of installation on the client computers receiving updates. If you choose to store the update files on Microsoft Update, then your WSUS server obtains only update information (metadata) for the criteria you have specified on the Synchronization Options page. If you choose to store the updates locally, you can limit the updates downloaded to your server by language.

You can specify whether to store update files on your local WSUS server or on Microsoft Update. Your software update points and sites must run a minimum of WSUS 4.0 with the hotfix 3095113to get the Upgrade

Upgrade: Specifies an upgrade for Windows 10 features and functionality.

Updates: Specifies an update to an application or file that is currently installed.

An update rollup generally addresses a specific area, such as security or a product component. These hotfixes can include security updates, critical updates, updates, and so on.

Update Rollups: Specifies a cumulative set of hotfixes that are packaged together for easy deployment.

Tools: Specifies a utility or feature that helps to complete one or more tasks.

These hotfixes can include: security updates, critical updates, software updates, and so on.

Service Packs: Specifies a cumulative set of hotfixes that are applied to an application.

Security Updates: Specifies a broadly released update for a product-specific, security-related issue.

Feature Packs: Specifies new product features that are distributed outside of a product release and that are typically included in the next full product release.

Definition Updates: Specifies an update to virus or other definition files.

Critical Updates: Specifies a broadly released update for a specific problem that addresses a critical, non-security-related bug.

PowerShell Alternative of Telnet Command.

SharePoint 2013 Deployment on Three-tier Farm.

Creating Custom Attributes In Active Directory.

Flexible Single Master Operations Roles.

Active Directory in Windows Server 2012.

Active Directory Sites and Organizational Units.

Active Directory Forest and Domain Design.

Wsus server 2012 r2