[kats]

It's an IoT standard / ecosystem developed by Google. So that you could control e.g. smart home devices through Google apps, similar to Apple HomeKit or Home Assistant. One annoying thing about Matter is that it's built on top of a networking protocol called Thread, which has no relationship to threads. Thread runs on top of Zigbee, Bluetooth Low Energy, or WiFi. It's pretty much a standard for a REST API with certain key/values for specfic application profiles. e.g. all IoT lights could use the same REST API so they are easier to integrate. Compared to many other IoT or embedded systems, Matter seems like it provides more and better resources to get started, however I haven't used it before. e.g. it provides open source tests for the application profiles. Google wants to push it as the 1 protocol that rules them all, but apps like Home Assistant might be more popular atm. Haven't used Matter but it seems like a good effort to get a whole bunch of small embedded devices doing things in the same way.