Grammar fix
main advantage
most important benefit
The biggest or most important positive point about something, especially when comparing options.
collocationB1common
Hear it in context
Notice where the phrase sounds natural.
- The main advantage of working from home is that you can save time on commuting.daily life
- In my opinion, the main advantage of studying abroad is that you get to experience a different culture.IELTS speaking
Fix the pattern
Pattern: the main advantage (of something) is...
WrongIts main advantage is to be cheap.
RightIts main advantage is that it's cheap.
Follow with 'that + clause' or a noun, not 'to be'.
Patternthe main advantage (of something) is...
Use it right
Choose the version that sounds natural in speech.
'The main advantage' is natural; 'foremost beneficial aspect' is jargon.
Build natural chunks
Words that usually travel with it.
the main advantage (of)ofbiggestis thatover
Don't confuse it
Compare with 'main disadvantage,' which means the most important negative point.