Grammar fix

key point

main idea

the most important idea or detail in something you are saying, reading, or discussing

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

The key point of her presentation was that everyone should have equal access to education.study
In my opinion, the key point of the discussion is that public transport needs to be more reliable for people to use it regularly.IELTS speaking

Pattern: key point (of/in something); the key point is (that)...

WrongThat's the most key point.

RightThat's the key point. / the main point.

'Key' isn't graded — avoid 'most key'; just say 'the key point'.

Patternkey point (of/in something); the key point is (that)...

Choose the version that sounds natural in speech.

Stiff Allow me to reiterate the most salient consideration.

Natural The key point is this.

'The key point' is natural; 'the most salient consideration' is academic.

Words that usually travel with it.

'Key point' is stronger than just 'point'—it means the most important part.