Quality of Service (QoS) is a set of networking rules that gives priority to specific types of internet traffic based on your needs. When your connection is busy, QoS ensures that important data, like a video call, gets priority over background downloads.
In a typical home, you might have several devices competing for bandwidth at once: someone streaming video, another person working on a video conference, a smartphone downloading an update, and a smart home device syncing data. Without QoS, all traffic is treated equally and speeds suffer across the board. With QoS enabled, your router automatically detects the types of traffic and allocates bandwidth accordingly. Video conferencing might get 40 per cent of your bandwidth, streaming gets 35 per cent, and background downloads share what remains.
QoS works in different ways depending on your router and setup. Some routers let you manually set priorities for specific devices or applications. Others use automatic detection to recognise video calls, gaming, or streaming and prioritise them intelligently. Advanced routers can even limit bandwidth to particular devices so one person's downloads do not drag down everyone else's speeds.
When you are shopping for a router or upgrading your broadband, QoS becomes more valuable if you have a smaller connection speed (for example, under 25 Mbps) and multiple users at home. Faster connections usually do not need aggressive QoS settings because there is enough bandwidth for everything. Check whether your router supports QoS in its specifications, and look for routers that offer granular controls (per-device or per-application priority) rather than basic on/off toggles. Your internet service provider might also offer QoS features at the modem level, though home router QoS usually provides better control.