You can link to the Prezi or Haiku Deck. If you want to make the page include a graphic, you can take a screenshot of your first slide, and then make that image link to the presentation site.

You’d wind up with something like this:

To include the presentation itself on the page, you can use one of the following methods:

• Upload the file to Microsoft OneDrive and use the embed code.
• Upload the file to Slideshare.net and embed it by using the following instructions:

Visit the Slideshare.net site:

You will need to either create a login or login by connecting to LinkedIn or Facebook:

Once you have logged in, click the Upload button in the upper right corner:

On the Upload page, click the Upload button. Leave the setting as Public.

Navigate to the PowerPoint file on your machine, and click Open:

Wait while the file uploads and is processed. Be sure to add a Category and Description (they’re required). Click Save & Continue:

Copy the embed code from the middle of the next screen:

Go to the WordPress page where you want the presentation to appear. Click on the Text tab on the right (rather than the Visual tab), and paste the embed code in. Publish your page.

Once your page is published (or saved), you will see the shortcode for your SlideShare presentation. WordPress.com automatically converts the embed code to this format:

View your WordPress page. The PowerPoint presentation will show up on the page, as shown here:

NOTE: you can find some additional details on using SlideShare in the WordPress.com documentation.