This is the 2804th most frequent Russian word.
рад
"Rad" means "glad" or "happy."
The word "рад" expresses the speaker's happiness or pleasure about the action of seeing someone.
Я рад видеть тебя.
I am glad to see you.
The word "рады" (plural form) conveys that the speaker and others are content or willing to assist the person being addressed.
Мы рады помочь вам.
We are happy to help you.
The word "рада" (feminine form) indicates that the subject experienced joy upon hearing some positive information.