Open your Google Slides presentation.

Click on the "Share" button in the top-right corner.

In the pop-up window, enter the email addresses of the people you want to share with.

Choose their access level: Viewer, Commenter, or Editor.

Click "Send" to share via email, or click "Copy link" to manually share the link.

If using the link, adjust the sharing settings to "Anyone with the link" and set the access level.