Surveillance refers to the close observation of people, places, or activities, often to gather information or ensure safety. This can be done using various tools, such as cameras, drones, or even software that tracks online behavior. Many organizations, including governments and businesses, use surveillance to monitor for security threats or to understand customer preferences. While surveillance can help prevent crime and improve safety, it also raises concerns about privacy. People worry that constant monitoring by authorities or companies might invade their personal space and lead to misuse of information. Balancing security and privacy is an ongoing challenge in today's world.