Network traffic refers to the flow of data across a computer network. It includes all the information sent and received by devices, such as computers, smartphones, and servers. This data can be in the form of emails, web pages, or streaming videos. Understanding network traffic is essential for managing and optimizing network performance, ensuring that users have a smooth experience. Monitoring network traffic helps identify issues like congestion or unauthorized access. Tools like network analyzers can track the amount and type of data being transmitted. By analyzing this traffic, network administrators can improve security and efficiency, making sure that the network runs effectively for everyone.