1.
shop; store; restaurant; establishment
The polite form of 店. Refers to any retail shop, restaurant, or similar establishment. Very commonly used in everyday conversation.
The polite prefix お attached to 店 (shop/store). In everyday Japanese, お店 is far more common than plain 店, especially when speaking. It can refer to any type of commercial establishment — retail shops, restaurants, bars, cafes, etc.
Usage
While 店 on its own can sound blunt, お店 is the standard conversational form. Using 店 without お is more common in compound words (店員, 店長) or when used as a suffix (花屋の店).