Public map views are counted when a visitor opens your locator on your app or website.
If a visitor is on your website but never launches your locator (views your map and locations), then it is not counted as a public map view. It only applies when they actually use your locator.
Also, public map views do not include usage on the Closeby website. For example, if you're designing and theming your locator, none of it will count as a public map view.