When listing smoke & carbon monoxide detectors on Facebook Marketplace, selecting the correct category is essential for visibility. The recommended path is Electronics → Home Security & Automation → Security Alarms & Sensors → Smoke & Carbon Monoxide Detectors.
This category placement ensures your listing appears in relevant searches and category browsing, helping potential buyers find your smoke & carbon monoxide detectors quickly. Using the correct category also improves your listing's performance in Facebook's recommendation algorithm.