Smart thermostats can be controlled with a smart device such as phone, tablet, smart speaker, or other internet-connected device. They typically allow you to schedule your desired temperature settings and you can also incorporate them into smart home automation systems.
Depending on the specific model, they can offer a plethora of cool features. Some can learn your heating and cooling preferences and automatically adjust based on said learning.
Many smart thermostats have diagnostic features, which can detect when there is a problem with your air conditioning or HVAC system. Your smart thermostat may also be able to remind you of when it is time to perform system maintenance, like when it is time to change your air filter. Additionally, your thermostat may be able to provide you with details regarding your energy consumption.