Robotics is a field of engineering that involves the design, construction, operation, and use of robots. The practice is generally accomplished through computer systems for their control, sensory feedback, and information processing. The goal of robotics is to create machines that can substitute for humans and replicate human actions. Automatons and drones can be used in many situations and for many purposes, but today many are used in dangerous environments (including bomb detection and de-activation), manufacturing processes, or where humans cannot survive (e.g. in space, underwater, in high heat, and clean up and containment of hazardous materials and radiation).
Automation, on the other hand, refers to the technology by which a process or procedure is performed with minimal human assistance. If you’ve been keeping an eye on business trends, you doubtless know that it can be applied in many areas such as manufacturing, transport, utilities, defense, facilities, operations, and lately, information technology. Interestingly, the concept has been and continues to be a key component in the industrial revolution and is used to perform tasks that are repetitive, boring, difficult, or dangerous for humans.
All that being said, you’ve also probably noted that the two fields are interconnected, as robotics often involves some level of automation, and many automated systems include robotic components. Yet, at the same time, they aren’t identical: not all automated systems are robotic, and robots don’t necessarily operate autonomously (they might require human control). Thus, robotics can be seen as a subset of automation. Make sense?