Co-channel interference occurs when multiple devices or systems use the same frequency channel to transmit signals. This overlap can lead to degraded performance, as the signals interfere with each other, causing disruptions in communication. It is commonly seen in wireless networks, such as Wi-Fi and cellular networks, where many users share limited frequency bands. To minimize co-channel interference, network designers often implement strategies like frequency planning and channel allocation. By carefully assigning different channels to nearby devices, they can reduce the chances of interference, ensuring clearer and more reliable communication for users in crowded environments.