these
The Italian word 'questi' is an adjective that translates into English as 'these'. It is primarily used to point towards specific things that are nearby. Similar to English, it changes based upon the gender and number of the noun it refers to. 'Questi' is used for masculine plural nouns.
Who are these men?
This sentence is a question asking about the identity of some men that the speaker is pointing out or referring to. It is a common usage of the word 'questi' (these) in a who question.
These kids like ice cream.
This sentence describes a group of children that the speaker is referring to who enjoy eating ice cream. The word 'questi' (these) is used here to refer to a specific group of children that are known to the speaker.
I bought these books yesterday.
This sentence communicates that the speaker bought some books in the past, specifically the previous day, and is pointing them out or referencing them in the present. The word 'questi' (these) is used to refer to the books that were purchased.