This is not a feature that was added to Website Builder, since it wasn't a highly used feature in Sitebuilder. If you would like a "poll" on your website, you will need to find HTML from a company that provides that service. Google has a survey option that works well.
Thanks. This brought up another question about the polling. I created a test poll in Sitebuilder and pointed to it from a page in Website builder. The preview works but when i published it I get an error message.