I've just completed an online course on using the Arduino as a webserver to remotely control actuators and view sensor values on cool looking gauges on a Dashboard.
I learned a ton on the Arduino in this course, how to build a webpage dashboard using HTML/CSS/Javascript as well as wire a complete project board using various components such as an Ethernet Shield, a 4 channel relay, various sensors and actuators, etc...
Here's a picture of what my final project board looks like:
The code is supplied in each lesson, and it builds on the previous, so it's pretty easy to follow. At the end of my project, I was able to create some triggers that would turn on/off a water pump based not only on the switch position selected on my webpage dashboard, but also based on sensor data. This now gives me a way to create automation if something was out of a pre-established parameters. My next step will be to modify this project so I can remotely view and control things at my cottage.
For those of you interested, here is the link to the course:
Arduino IoT Websever Dashboard online course
Also, be careful not to pay the full price for the course... I paid about $15 for it, as it come on and off special pricing every few days.