Congratulations

You can use it as a single word. Just shout Congratulations! when a friend wins a race. You can also say Congratulations on... followed by the event. For example, Congratulations on your new job! It is very flexible. You can even shorten it to Congrats to save time. It works in person, over the phone, or in a card.

Use it for big life milestones. Use it for weddings, graduations, or a new baby. Use it for small wins too. Did your friend finally bake a cake that didn't burn? Say it! It is perfect for promotions at work. It also works when someone buys a new house. If the news is good, this word fits.

Do not use it for things that are just 'okay.' If someone ate a sandwich, don't say it. That is just weird. Also, be careful with 'luck' vs 'achievement.' Don't say it if someone is about to take a test. Say Good luck instead. Save Congratulations for after they pass. Using it too early can feel like a jinx!

In English-speaking cultures, we love to celebrate individual effort. This word is the ultimate social lubricant. It shows you are not jealous of their success. Historically, it was considered rude to say it to a bride. People thought it implied she 'won' a husband. Today, that rule is dead. Everyone gets a Congratulations at a wedding now!

Congrats is the most common short version. It is perfect for texting. Way to go! is a more active, high-energy version. Kudos is a bit more intellectual but means the same. If you want to be fancy, try Felicitations. But honestly, stick to Congrats for 90% of your life. It is the safest and warmest choice.