A roadmap is important because it helps the reader place the research problem within the context of their own perspectives about the topic.
Reviewing and, if necessary, rewriting the introduction ensures that it correctly matches the overall structure of your final paper. If you feel that you must seek out an authoritative definition, use a subject specific dictionary or encyclopedia [e.g., if you are a sociology student, search for dictionaries of sociology].
Delimitations refer to those characteristics that limit the scope and define the conceptual boundaries of your research. A good database for obtaining definitive definitions of concepts or terms is Credo Reference.
All introductions should conclude with a brief paragraph that describes the organization of the rest of the paper.
Think of the structure of the introduction as an inverted triangle of information that lays a foundation for understanding the research problem.
Start with a sentence that will catch the reader’s interest.
However, keep in mind that it’s difficult to attract reader’s attention, especially, if your paper is aimed to impress a teacher or professor, who has already checked thousands of papers and can’t be surprised by some simple examples or boring introductions.
Also, it’s a good way to set the tone of text that follows.
There is no absolute working and proper structure or format for your opening clause because you can write essays on many various topics and start them in many different ways.
This is why the essay introduction paragraph has to be perfect.
It should be engaging and contain an interesting hook.