Microsoft has a bunch of optional updates for your Windows 10 computer. You don’t need to download them, but if you like keeping your PC as current as possible, you may want to download these.
If your PC is running the Windows 10 November 2019 Update (version 1909) or the Windows 10 October 2018 Update (version 1809), then you have some updates to download. They will also come as part of September’s Patch Tuesday, so you don’t need to download them now, as you can get them then. Of course, we’re not all patient, and sometimes you just want the latest updates for your PC right now through optional updates.