惠顾 is a formal, courteous expression meaning 'your patronage' or 'your gracious visit'. It is used by businesses to welcome customers or thank them for shopping. It functions as a set phrase, typically appearing in constructions like 欢迎惠顾 ('welcome your patronage') or 感谢惠顾 ('thank you for your patronage'). It carries a polite tone and is common in written store signs, announcements, or customer service interactions.