A few weeks ago I published directions on how to create and conduct a poll in Google Slides. That video featured using the Poll Everywhere Chrome extension. People who prefer to use PowerPoint over Google Slides can also use Poll Everywhere in their slides.
Poll Everywhere offers a free PowerPoint add-in that you can use to create and conduct polls directly in your presentation. You can create polls that are multiple choice and open response. Results of the poll can be displayed in a variety of formats. Students can respond to your polls from their computers of phones anonymously or as logged-in users.
In the following video I demonstrate how to create and conduct a poll in PowerPoint. The video also shows you how students respond to a poll created using the Poll Everywhere PowerPoint add-in. The features shown in the video work with both free and paid Poll Everywhere accounts.