Final answer:
Headings help readers navigate and locate specific information in complex documents.
Step-by-step explanation:
When a document is complex or full of information, headings help readers navigate and locate specific information. For example, a document with a table of contents can help readers quickly jump to different sections and subsections. Additionally, headings and subheadings group related information, provide an outline of the content, and make it easier for readers to understand the overall structure.