A mesh router or mesh wireless system is a type of wireless network that uses multiple devices to create a single, seamless network. The devices in a mesh network are called nodes (wireless access points), and they are connected to each other wirelessly. This allows the network to cover a wider area and provide better performance than a traditional router.
A wireless access point, or WAP, pulls Wi-Fi from an existing transmission point to get a better signal.
In a mesh system, the individual mesh points can also be called wireless access points. A mesh system provides coverage throughout an entire location or building. If the network is busy, slow, or clogged, the Internet signal will instantly leap to any other mesh points to navigate the problem. The closest mesh point to your device does not guarantee that it is the one you are using. A mesh network recalibrates the signal without you having to select an additional point or navigate an obstruction.
Imagine a giant bag of sand and a single person (single router) has to support and move this heavy load single-handedly. For each mesh point, we add the additional mesh point to take away a portion of the load or burden on the entire system. If we have four people (or mesh points), each one only has to carry 25 pounds of load. The 100 pounds is distributed amongst four people (or mesh points around a home).