Being new in this particular field, I would like to know about the work of an test automation engineer
In IT, an automation engineer refers to someone who delivers automated solutions for software processes. They focus on improving the efficiency of various manufacturing and computer processes by automating certain parts of the system. Automation engineers plan and change existing technology so that it needs less human interaction, and they monitor the performance of the changes they make. Refer here to checkout What is an automation engineer? A growing role to address IT automation