Grammar fix

in a nutshell

briefly summarising

Used to introduce a short summary or the main point of something, especially after giving more details.

expressionC1common

Hear it in context

Notice where the phrase sounds natural.

In a nutshell, the project was a success because everyone worked together.communication
To answer your question, in a nutshell, I believe technology has made our lives more convenient, even though it comes with some challenges.IELTS speaking

Pattern: in a nutshell, [main point/summary]

WrongIn the nutshell, it went well.

RightIn a nutshell, it went well.

It's 'in A nutshell', not 'in the nutshell'.

Patternin a nutshell, [main point/summary]

Choose the version that sounds natural in speech.

Stiff To express the matter in a highly condensed form, we succeeded.

Natural In a nutshell, we pulled it off.

'In a nutshell' is the natural 'to sum up'; the formal version is clunky.

Words that usually travel with it.

'In short' is similar, but 'in a nutshell' is slightly more conversational and often used to wrap up a longer explanation.