confectionery shop; candy store; sweet shop
A shop that sells Japanese or Western sweets, snacks, and candies. The お is a polite prefix commonly used in everyday speech.
I bought cookies at the sweet shop in front of the station.
There's a candy store near the station.
The Japanese sweets at this confectionery shop are very delicious.
I bought chocolate at the candy store.
She says she wants to open a candy store in the future.
和菓子屋 specifically sells traditional Japanese sweets, while お菓子屋 can cover both Japanese and Western confections.
ケーキ屋 is narrowly a cake shop or patisserie, whereas お菓子屋 covers a wider variety of sweets and snacks.
Compound of honorific prefix お + 菓子 (sweets) + 屋 (shop).