A "Privacy Screen" is a type of filter that can be applied to electronic devices like laptops and smartphones. It limits the viewing angle of the screen, making it difficult for people nearby to see the content displayed. This is particularly useful in public places, such as cafes or offices, where sensitive information may be visible to others. These screens are typically made from a special material that darkens the display when viewed from the side. They can be easily attached and removed, providing an extra layer of security for users who want to protect their personal data and maintain confidentiality.