Router configuration is the most essential thing for effective internet access, and the Wavlink AC1200 setup guidelines serve as the cardinal factors for best performance. Incorrect configuration can result in a lack of connectivity, having weak signals, or even opening up devices to security problems. 

Following the guide step-by-step, you can configure settings for security measures such as network access and password entries, as well as optimal placement. Missing or acting on the Wavlink AC1200 Setup instructions incorrectly has proven to lead to reduced speeds or frequent disconnections.

The manual includes some essential troubleshooting that will prevent the majority of the common mistakes in setting up. Whether one is a beginner or has some tech savvy, these instructions teach and guide to get the most out of the router. Just follow them, and you will enjoy uninterrupted, seamless, and secure internet access.