As a person working with the field of IT, you know there is a lot of information on the Internet about everything. So much, it almost becomes impossible to quickly find the right information for a certain subject, which inhibits the ability to properly learn something; you either get a too many options to make a decision, or specific information is in separate articles somewhere else. In short, information is disorganized, and learning becomes a disorienting journey. What if there was a job that focused on how information is structured and processed by the user? You get Instructional Design.
Instruction Design (or called Instructional Systems) is the process of creating structures and delivery systems for instructional content to be presented to an audience. Though not exclusive to IT, it incorporates a lot of the same skills, such as Technical Writing (needing to be concise and direct with directions), knowledge of technology (knowing how to code, working with software, video production), and understanding how information interacts with itself and the audience (information organization/knowing your audience). Here is an article that explains ID more thoroughly, from its past conception, to how it applies today:
LIS 4022 Spring 2020 