"Double Tap" is a term commonly used in social media, particularly on platforms like Instagram and Facebook. It refers to the action of quickly tapping the screen twice on a post to show appreciation or "like" the content. This feature allows users to engage with posts without needing to click a separate button. In addition to social media, "Double Tap" can also refer to a gesture used in mobile devices, where tapping the screen twice can zoom in or activate certain features. This functionality enhances user experience by providing quick access to various options and improving navigation on touchscreens.