Data packets are small units of data that are transmitted over a network. When information, such as an email or a video, is sent from one device to another, it is broken down into these packets. Each packet contains a portion of the data, along with important information like the sender's and receiver's addresses, which helps ensure that the packets reach their destination correctly. Once the data packets arrive at their destination, they are reassembled to recreate the original information. This method of transmission is efficient and allows for faster communication over networks like the Internet. Data packets are essential for various applications, including web browsing, streaming, and online gaming.