InPrivate Filtering helps prevent website content providers from collecting information about sites you visit. Here's how it works.
Many webpages use content—such as advertisements, maps, or web analysis tools—from websites other than the one you are visiting. These websites are called content providers or third-party websites. When you visit a website with third-party content, some information about you is sent to the content provider. If a content provider offers content to a large number of the websites you visit, the content provider could develop a profile of your browsing preferences. Profiles of browsing preferences can be used in a variety of ways, including for analysis and serving targeted advertisements.
Usually this third-party content is displayed seamlessly, such as in an embedded video or image. The content appears to originate from the website you originally went to, so you may not know that another website might be able to see where you are surfing. Web analysis or web measurement tools report website visitors' browsing habits, and are not always obvious to you. While these tools can sometimes appear as visible content (such as a visitor counter, for example), they are often not visible to users, as is often the case with web beacons. Web beacons are typically single-pixel transparent images whose sole purpose is to track website usage, and they do not appear as visible content.
InPrivate Filtering works by analyzing web content on the webpages you visit, and if it sees the same content being used on a number of websites, it will give you the option to allow or block that content. You can also choose to have InPrivate Filtering automatically block any content provider or third-party website it detects, or you can choose to turn off InPrivate Filtering.