referring to all people in a group

सभी लोग

English Usage: Everybody enjoyed the concert.

Hindi Usage: सभी लोगों ने कॉन्सर्ट का आनंद लिया।

Everyone or a large number of people.

सभी लोग या बहुत सारे लोग

English Usage: All the world and his wife showed up at the concert.

Hindi Usage: कंसर्ट में हर कोई मौजूद था।

used as a pronoun to represent all people

सभी

English Usage: Everybody has to submit their work by Friday.

Hindi Usage: सभी को अपना काम शुक्रवार तक प्रस्तुत करना है।