froh sein
to be glad
To be happy, relieved, or pleased about something.
Ich bin so froh, dass die Prüfung vorbei ist.
I'm so glad that the exam is over.

glad
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to be glad
To be happy, relieved, or pleased about something.
Ich bin so froh, dass die Prüfung vorbei ist.
I'm so glad that the exam is over.

When expressing joy about a thing, you use 'froh über' with the accusative. When you are happy about a situation, you use a subordinate clause with 'dass' (that).
Ich bin froh über deine Hilfe.
I'm glad about your help.
The adjective 'froh' (glad) is almost always used together with the verb 'sein' (to be), e.g. 'ich bin froh' (I am glad), 'er war froh' (he was glad). Using it directly before a noun is rare.
Wir sind alle froh, dass das Projekt erfolgreich war.
We are all glad that the project was successful.
In the meaning 'fröhlich' (merry/cheerful), 'froh' is now almost only part of fixed greetings for holidays. The most common are 'Frohe Weihnachten' (Merry Christmas) and 'Frohe Ostern' (Happy Easter).
Wir wünschen euch allen ein frohes neues Jahr!
We wish you all a happy new year!
happy / lucky
'glücklich' and 'froh' both describe a positive feeling. 'glücklich' often sounds stronger and more general: you feel deep joy or satisfaction. 'froh' is used very often when you are relieved or pleased about a specific reason, for example after good news. The words can be confused because both express joy. A practical tip: you are 'glücklich' with your life or in a beautiful moment; you are 'froh über' something or 'froh, dass' something happened.

Bei der Arbeit war er froh, dass der Zug trotz des Schnees pünktlich kam.
At work, he was glad that the train arrived on time despite the snow.
Nach dem Sieg steht die Mannschaft glücklich auf dem Platz.
After the victory, the team stands happily on the field.