Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
key section
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "key section" is correct and usable in written English.
You can use this phrase when referring to an important part of a written document, such as a book, essay, business report, or legal document. For example, "The fourth chapter of the report is the key section because it outlines the key findings."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(6)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Here's the key section from his speech in Glasgow.
News & Media
Liquefaction is the key section on floating platform.
Science
Here's the key section: I respect and admire all the candidates running for the leadership.
News & Media
Here's the key section of her speech: Fundamentally, excessive inequality makes capitalism less inclusive.
News & Media
Here's the key section: Very frankly I am not happy with the progress made so far.
News & Media
However, the key section was some way down the summary and was missed until now.
News & Media
The source dismissed a key section of the dossier as full of "silly errors".
News & Media
3.15pm: Terry Macalister has sent me what he says could be the key section in BP's report.
News & Media
He delivered the key section of the speech unchanged from the version released yesterday: "We need successful business.
News & Media
Here's the key section (from 8 minutes, in the video embedded above) Remember the postwar generation, my generation.
News & Media
The key section of the speech remained unchanged from the version released on Tuesday: "We need successful business.
News & Media
Expert writing Tips
Best practice
Use "key section" to highlight the most crucial part of an analysis or argument, ensuring that the reader understands its importance.
Common error
Avoid using "key section" excessively, as it can dilute its impact. Instead, vary your language by using synonyms like "essential part" or "critical segment" to maintain reader engagement.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "key section" functions as a noun phrase, typically serving as a subject, object, or complement in a sentence. It identifies a specific part of something (like a document or a process) that is considered the most important or essential. As seen in the examples from Ludwig, it commonly highlights critical information or procedures.
Frequent in
News & Media
55%
Science
28%
Formal & Business
7%
Less common in
Wiki
3%
Academia
3%
Reference
1%
Ludwig's WRAP-UP
In summary, "key section" is a versatile noun phrase used to denote an important or essential segment within a larger context. According to Ludwig, this phrase is grammatically correct and very common, particularly in news and media, scientific, and formal business contexts. It serves to emphasize significance and direct attention to crucial information. While it's a useful phrase, remember to avoid overuse and consider synonyms such as "essential part" or "critical segment". Employing "key section" effectively ensures clarity and focus in your writing, drawing the reader's attention to the most important aspects of the subject matter.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
essential part
Emphasizes the necessity or fundamental nature of the section.
critical segment
Highlights the importance and potential impact of the section.
pivotal element
Focuses on the section's role as a turning point or central component.
central component
Highlights that the section is one of the main building blocks of something.
significant portion
Stresses the importance and size or impact of the section.
main segment
Focuses on it being the most important part of something.
core element
Focuses on the section as the fundamental piece of something.
important aspect
Highlights the notability of the section within a broader context.
crucial passage
Highlights that the specific section is extremely important or essential.
vital segment
Emphasizes the section's indispensability and life-sustaining role.
FAQs
How can I use "key section" in a sentence?
You can use "key section" to highlight an important part of something, for example: "The "key section" of the report outlines the financial projections."
What can I say instead of "key section"?
You can use alternatives like "essential part", "critical segment", or "pivotal element" depending on the context.
Is it redundant to say "the key section is key"?
Yes, saying "the "key section" is key" is redundant. It's better to simply state what makes that section important or use a more descriptive adjective.
Which is more appropriate, "key section" or "main section"?
"Key section" emphasizes importance, while "main section" simply indicates the primary division. Choose the term that best reflects the intended meaning.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested