Synopsis is often used to express a brief summary or summary of one thing or one thing. It is an abstraction of the actual situation, thus highlighting some key points or the most important information. An outline usually includes a simplified version of the plot or content, and one or several of the most important elements, which helps to convey complex facts or information quickly. In different fields and different works, the form and content of the outline may also be very different.

Usage of the outline:

1. Quickly understand the content: Reading the outline can help readers quickly understand the main contents and conclusions of articles, reports or other documents, saving time and energy.

2. Decide whether to read in depth: The outline can help readers decide whether to read the full text in depth. If the outline interests readers, they can continue reading the full text.

3. Help memory: Outlines can help people remember the main contents and conclusions of articles, reports or other documents, because they provide a concise summary.

4. Search Engine Optimization (SEO): On a web page, the feed can be used as metadata to help search engines better index and display the page, thus improving the click-through rate of the page.

5. Academic writing: In academic writing, the outline is usually a part of the research paper, which can help readers quickly understand the purpose, methods, results and conclusions of the research.

In a word, outline is a very useful tool, which can help people understand important information quickly and can be widely used in many fields.

The application of outline (or abstract) includes:

1. Dissemination: Abstracts can be used to disseminate information, such as news reports and research papers. They provide a short summary so that readers can quickly understand the content and decide whether they need to read the full text in depth.

2. Search Engine Optimization (SEO): Search engines use abstracts to determine the relevance and value of pages. A good outline can help the website rank higher and attract more clicks.

3. Knowledge management: In the field of knowledge management, abstracts are used to describe information resources, such as documents, meeting records and research reports. These abstracts can help people find important information quickly and improve work efficiency.

4. Academic publishing: Academic journals usually require authors to provide outlines for their articles, so that editors and readers can quickly understand the research contents and conclusions.

5. Education: In the field of education, teachers can ask students to write an outline to help them understand and summarize what they have learned and improve their writing ability.