What is the meaning of それ?

that (near the addressee)

that one (near the addressee)

the one we are talking about (either the speaker or the addressee knows)

that of (used only in writing)

Used to call someone's attention to something; there!, look!

Used to stir someone to action or fire oneself up; go on!, let's go!, right!, here goes!, come on!

Source: wiktionary.org