Learn Spanish (Spain): Lo bueno de esta universidad es el campus. - The good thing about this university is the campus.

Lo is the neuter article. We use it before a masculine singular adjective like bueno to turn it into an abstract noun. Here, lo bueno means the good thing or the good part. If we used el bueno, it would refer to a specific masculine noun mentioned earlier, meaning the good one.

Why does de translate to about in this sentence instead of of?

In Spanish, the preposition de is used to link the abstract concept (lo bueno) to its subject (esta universidad). While it translates most naturally to about in English, it functions literally as the good thing of this university.

Why use es instead of está?

We use es (from the verb ser) because the sentence is identifying or defining what the good thing is. We are equating the subject (lo bueno) with a noun (el campus). The verb ser is always used for this kind of equation.

Is campus singular or plural in this sentence?

It is singular here, as shown by the singular article el. Campus is a loanword that ends in an s even in its singular form. To make it plural, the noun itself does not change, but the article does, becoming los campus (the campuses).