This is the 57th most frequent Japanese word.
今
"Now" or "the present."
In this sentence, '今' (ima) means 'now,' referring to the present time when the action is occurring.
今、私は図書館にいます。
Now, I am at the library.
Here, '今' (ima) is used to denote the current moment relative to the speaker's context.
今は忙しいですから、後で話しましょう。
Because I am busy now, let's talk later.
'今' (ima) in this usage is asking about the present time's activity, emphasizing immediacy.