You'll see that the unbranded/general design keeps things simple, and it blends into different setups without drawing attention.
ESP8266 5V Wifi Relay Module Board TOI APP Controlled For Smart Home-
Because it's unbranded/generic, you can pair it with various sockets without visual conflicts.
I like that it has a nice touch of being unbranded/general, so you can add your own labeling.
You will find that the unbranded/general look helps when you're building kits for teaching or hobby use.