This scoping review examines the use of consumer-grade EEG devices in research, focusing on their application, location, and domain. The study identified 916 studies using consumer-grade EEG, with Emotiv being the most commonly used device. These devices are widely used for brain-computer interfaces (BCIs), experimental research, signal processing, validation, and clinical purposes. The review highlights the potential of consumer-grade EEG in various fields, including engineering, robotics, cognitive neuroscience, and clinical applications. Despite some limitations, such as lower signal quality compared to research-grade devices, consumer-grade EEG remains a valuable tool for researchers due to its affordability and portability. The review provides a comprehensive overview of the current state of consumer-grade EEG in research and suggests future directions for further exploration.This scoping review examines the use of consumer-grade EEG devices in research, focusing on their application, location, and domain. The study identified 916 studies using consumer-grade EEG, with Emotiv being the most commonly used device. These devices are widely used for brain-computer interfaces (BCIs), experimental research, signal processing, validation, and clinical purposes. The review highlights the potential of consumer-grade EEG in various fields, including engineering, robotics, cognitive neuroscience, and clinical applications. Despite some limitations, such as lower signal quality compared to research-grade devices, consumer-grade EEG remains a valuable tool for researchers due to its affordability and portability. The review provides a comprehensive overview of the current state of consumer-grade EEG in research and suggests future directions for further exploration.