Cheers
Cheers has 2 meanings
Congratulations
Cheers is a celebratory exclamation used to congratulate someone or acknowledge a success. It is often used after a toast when everyone raises their glasses and then takes a drink.
Example
Here's to another great 10 years. Cheers!
In European countries, especially, it's common to end emails with the word cheers. This sign-off means roughly the same thing as "best wishes" or "regards."
Cheers is a friendly, somewhat casual sign-off. Thus, you're most likely to encounter it in messages from friends, family members, or cheerful acquaintances. However, cheers is formal enough that some use it in professional settings, to convey more feeling than a drab "regards."