The best way to present a Flourish visualization is with a story. Flourish stories are designed specially to help you present your visualization.
Learn how to make a story.
You can quickly add a static image of any visualization to a regular presentation tool, such as PowerPoint, Keynote or Google Slides by simply screen grabbing the graphic, which is easy on Windows or on a Mac. Many templates also have a image download feature.
It’s also possible to make a video or gif from your visualization or story and drop this into a regular presentation.
It’s even possible to embed an interactive Flourish visualization or story (or any other web content) in a PowerPoint or Keynote slide if you install a suitable PowerPoint add-in, such as LiveSlides. Note that you’ll need the plug-in installed on any computer you want to present from.