This phrase is a polite way to express hope that a customer or client will use your service or visit your establishment again. It means "We look forward to your next visit/use of our service." It's commonly used in customer service at the end of an interaction, in shops, restaurants, or hotels.

お客様の再来店や再利用を、丁寧に期待してお待ちしていることを伝える言葉です。