Real estate marketing services; Advertising and promotion service; Providing an interactive website for advertising specials, discounts and special offerings promoting the services of others, and responding to customers inquiries for others in the field of real estate; On-line advertising and marketing services related to the rental and sale of real property; real estate listing; rental of real estate; Providing real estate property information services via proximity beacon technology; Providing a website portal offering information related to real estate properties; Providing information in the field of real estate; providing information in the field of real estate by means of a website that features links to real property for rent or lease; Providing information in the field of real estate by means of linking the website to other websites featuring real estate information