Us is a pronoun that refers to the speaker and one or more other people together. When you say “us,” you're including yourself in a group. If your teacher asks “Who wants to help clean up?” and you and two friends raise your hands, she might say “I'll give you extra recess time,” meaning your whole group.

The word creates a sense of belonging and togetherness. Notice how different these sentences feel: “They won the championship” versus “We won the championship.” That shift from they to we (and them to us) changes you from an outsider to an insider. When a coach says “Let's give it everything we've got” before a game, that we makes everyone feel like part of the same team.

Us is what grammarians call an objective pronoun, which means it receives the action in a sentence rather than performing it. You say “The teacher chose us” (not “The teacher chose we”). You also say “between you and me” rather than “between you and I,” for the same reason.

Sometimes people use us to create connection even with strangers, like when a principal addresses an assembly: “Let's make this our best year yet.” That us can make a whole school feel unified around a common goal.