What is a common purpose of using footnotes in a written passage?

Using footnotes in a written passage primarily serves to provide citations for information. This is important in academic and professional writing as it allows the author to give credit to original sources, thus enhancing the credibility of the work. Footnotes can point readers to relevant research, data, or theoretical frameworks that support the statements made in the text. By incorporating footnotes, the author also enables readers to explore the references for further understanding.

The function of footnotes is distinct from summarizing main points, which typically does not require citation and generally appears in the text itself. Footnotes do not include graphics or images since their primary focus is textual information. Additionally, while footnotes can occasionally present additional context or clarification, they are unsuitable for elaborating on personal opinions, as this intention is best served through the main narrative rather than in citations. Thus, the use of footnotes effectively enhances scholarly communication by attributing the sources of information and providing an avenue for further exploration.