Specific details are not a required part of an introductory paragraph.
The introductory paragraph of an essay functions to introduce the topic that is going to be discussed in the body paragraphs as well as to establish the boundaries of that topic. The hook of this paragraph carries out this task. Moreover, the introductory paragraph generally indicates the type of the essay that is being read, that is, whether it is an argumentative text or an expository text, usually by means of a thesis statement. However, specific details or, in other words, additional information about the topic of the essay is presented in the body paragraphs, which include facts, statistics, examples that support the topic sentence.