Questions & Answers about Это особо важно.
Because важно is the form normally used in the pattern Это важно = This is important.
Here, важно is not describing a masculine noun directly. It is being used predicatively, as part of the statement about это. In English, we also say This is important, not This is important one.
Compare:
- важный вопрос = an important question
- Это важно = This is important
So in Это особо важно, важно means important in the sense of is important.
Это here means this or sometimes it, depending on context.
It often refers to:
- a thing just mentioned
- a situation
- an idea
- something being pointed out
So Это особо важно can mean:
- This is especially important
- It is particularly important
Russian это is very common in this kind of sentence.