Advertising and publicity services, namely, promoting the goods, services, brand identity and commercial information and news of third parties through print, audio, video, digital and on-line medium; Advertising, marketing and promotional services related to all industries for the purpose of facilitating networking and socializing opportunities for business purposes; Maintaining a registry of national and international databases in the field of medical providers; Marketing the goods and services of others by means of location-based messaging; Mobile advertising services for others; On-line advertising and marketing services; Promoting and showcasing the goods of others in the field of medical providers by means of an on-line shopping site with links to the retail advertisements of others; Promoting, advertising and marketing on-line web sites of others; Providing a searchable on-line advertising website and guide featuring the goods and services of other vendors via the Internet; Provision of an on-line marketplace for buyers and sellers of goods and services