It is a sensor which measures light, temperature, humidity and fertilizer and sends notifications & updates on your plant via Bluetooth. In other words you get notifications to water your plant, or to give it more or less light. It looks like an awesome tool that would help novice gardeners to watch for their plants.
What I would like – as a novice gardener – is also to learn to recognize when the plant needs watering or else, how /when to change the pot and basically how to best take care of it. Perhaps with a bit of gamification added, this tool could be also an awesome device to help to train your sense of observation, your botanical knowledge and maybe to discover which plants would fit best with which to create your ideal garden.