Should is a word that expresses what seems right, wise, or expected in a situation. When you say “I should study for tomorrow's test,” you're recognizing that studying is the smart choice, even if part of you would rather play video games. When your mom says “You should wear a jacket,” she's suggesting what makes sense given the cold weather outside.

The word carries a sense of obligation or advice, but it's gentler than words like “must” or “have to.” If someone says “You must finish your homework,” there's no choice. But “You should finish your homework” acknowledges that the decision is ultimately yours, even though one choice is clearly wiser than the other.

People also use should to express what they expect to be true: “The package should arrive tomorrow” means you have good reason to think it will, though you can't be completely certain. When something unexpected happens, you might say “That shouldn't have happened” to express surprise or disappointment.

Sometimes people get trapped in “shoulds,” constantly thinking about what they're supposed to do instead of what actually needs doing. The word can be a guide toward good judgment, not a source of endless guilt about every small choice.