Reference works like dictionaries and encyclopedias, some of which are highly specialized, and reference websites, can be useful for:
A note on using Wikipedia: Wikipedia can be a great resource for getting started on research. I often use Wikipedia to get an overview on an interesting subject and gather some key information. Like with all resources, I recommend checking the references and verifying the information in an article before considering it credible.
A note on using Generative AI: I don't recommend using generative AI for research. Some people use generative AI tools to generate lists of questions or prompts when doing research, which is technically OK. My big caveat here is to verify any information given to you by a generative AI tool. A lot of information created by AI is incorrect and/or incomplete. Some generative AI tools might be recommended by your professors and are fine in appropriate contexts. I still recommend always verifying information from generative AI.
Encyclopedias and reference resources offer a broad overview on a topic and provide information about the established basics in a discipline. These resources answer the "Who? What? When? Where? Why?" questions which can be foundational to research.