Marketing services, namely providing informational web pages designed to generate sales traffic via hyperlinks to other web sites; Promoting the goods and services of others by means of operating an on-line shopping mall with links to the retail web sites of others; Promoting the goods and services of others by providing hypertext links to the web sites of others; Providing a web site at which users can offer goods for sale and buy goods offered by others; Providing a web site that enables users to post items for sale through on-line classified advertisements; Providing a web site where users can post ratings, reviews and recommendations on products and services; Providing a web site whereby buyers of goods or services locate and receive quotations from multiple competitive sources and sellers of goods or services identify and bid on multiple new sales opportunities; Providing a web site which features advertisements for the goods and services of others on a global computer network; Providing on-line directory information services also featuring hyperlinks to other web sites; Providing space at a web site for the advertisement of the goods and services of others; Rental of advertising space on web sites