Advertising services; Advertising and publicity services; Business management and organization consultancy; Conducting marketing studies; Coupon procurement services for others; Demonstration of goods; Marketing the goods and services of others; On-line advertising services for others; On-line advertising and marketing services; On-line advertising on a computer network; On-line trading services in which users post requests for products and negotiate transactions via the Internet; Preparation of customized promotional and merchandising materials for others; Promoting, advertising and marketing on-line web sites of others; Providing and rental of advertising space on the internet; Providing and rental of exhibition stands and booths including respective equipment; Provision of an on-line marketplace for buyers and sellers of goods and services; Sales promotion for others; Sponsorship search; Online service for connecting social network users with retailers for the purpose of facilitating discounted purchases; Providing commercial and business contact information