Ad serving, namely, placing advertisements on websites for others using specialized computer software; Advertising and advertisement services; Advertising on the Internet for others; Demonstration of goods; On-line advertising on computer communication networks; Operating on-line marketplaces for sellers and buyers of goods and/or services; Promoting the goods and services of others over the Internet; Promoting the goods of others, namely, providing coupons, rebates and vouchers for the goods of others; Provision of a web site featuring commercial information on shopping; Provision of space on websites for advertising goods and services