What is the purpose of private browsing in modern browsers?

The purpose of private browsing in modern browsers is to delete history, cache, and cookies after the use of the session. When a user engages in private browsing, the browser does not retain any information related to the websites visited during that session. This means that once the private browsing window is closed, all records of those activities—such as browsing history, temporary files, and cookies—are not stored on the user's device. This feature provides users with a level of privacy, ensuring that subsequent users of the same device or any monitoring systems cannot easily trace what websites were accessed during a private browsing session.

The other options do not accurately reflect the primary purpose of private browsing. Enhancing connection speed is generally unrelated to the private browsing feature, and it does not inherently provide any speed advantages. The capability for unlimited downloads is not tied to private browsing, as download limits are typically defined by the browser's settings or the underlying internet connection rather than the browsing mode. Preventing access to certain websites is more aligned with content filtering or parental controls rather than the purpose of private browsing, which focuses on privacy and session data management.