What is the main function of a pop-up blocker in a web browser?

The primary function of a pop-up blocker in a web browser is to prevent unwanted advertisements from appearing on the screen as pop-up windows. Many web users find pop-ups intrusive and distracting, often leading to a cramped browsing experience or accidental clicks that redirect them to unwanted sites. By blocking these pop-up ads, a pop-up blocker enhances user experience, allowing for a more streamlined and focused browsing session.

While optimizing website performance, enhancing browsing speed, and enabling secure connections are important functions of web browsers, they do not specifically address the role of pop-up blockers. Pop-up blockers are dedicated tools specifically designed to limit or eliminate the appearance of pop-up advertisements, making option B the most accurate representation of their main function.