What does the phrase "the most important pieces of information" refer to?

The phrase "the most important pieces of information" refers to key points because key points encapsulate the main ideas or essential information in a text. They highlight the core messages that the author intends to convey, making these points crucial for understanding the overall content. In contrast, supporting details are supplementary information that provides context or elaboration on the key points but are not the main ideas themselves. Footnotes serve as additional references or clarifications related to specific content and do not typically represent the primary information. Summaries provide a condensed version of the text, encompassing key points but not directly referring to them as the most important pieces. Therefore, key points is the most accurate interpretation of the phrase in question.