This is the 768th most frequent Korean word.
구축
"구축" means "construction," "establishment," or "building (of something)."
In this sentence, '구축' is used to signify 'establish' in the sense of setting up a system or structure.
그 회사는 경제 체제를 구축하려고 노력하고 있다.
The company is striving to establish an economic system.
Here, '구축' is used to mean 'build' referring to the development or assembly of a platform.
그들은 새로운 학습 플랫폼을 구축하는 과정을 설명했다.
They explained the process of building a new learning platform.
'구축' implies 'construction' and is focused on the implementation phase of assembling a system.