What is Keynote for iCloud?
Keynote for iCloud allows you to create and edit presentations using a web browser.
You can share a presentation with others by sending them a link to it. Recipients can use the link to view the presentation and you can also allow them to edit it so you can all work collaboratively. Any changes you or others make to the presentation are saved in iCloud, so everyone always sees the latest version.
Your presentations in iCloud are also available in Keynote for iOS, iPadOS and Mac if you set up iCloud on your iPhone, iPad, iPod touch or Mac.
When working with Keynote for iCloud, make sure you use a recommended web browser. See the Apple Support article System requirements for iCloud.