Advertising and sales promotion for third parties; dissemination of commercial and advertising announcements on behalf of third parties; rental of advertising space on behalf of third parties; presentation of goods on all communication media for retailing; organization and conducting of commercial or promotional events on behalf of third parties; commercial mediation for third parties, namely, commercial matching of economic actors on behalf of third parties; business partnership research services on behalf of third parties; commercial advice, commercial research, market analysis and search for business partnerships in the field of advertising; company management assistance services, consulting and assistance in business organization and management; brand strategy services on behalf of third parties; creation of advertising material, advertising media and advertising objects, for printing or digital communication; consulting services with respect to commercial and advertising strategy; consulting and assistance services in the field of advertising, marketing and promotion of third-party activities; providing an online marketplace for commercial referencing, promotion, purchase and sale of goods and services on behalf of third parties; providing an online marketplace for optimizing supply and demand of goods and services on behalf of third parties; providing sales and promotional space online for buyers and sellers of goods and services; commercial advisory services with respect to purchase and sale of goods on behalf of third parties; commercial information and advice for consumers (consumer advice shop); analysis of consumer behavior in the field of advertising; management and compilation of computer databases that can be consulted online in the field of advertising; management of computer files and collection of data in a central file for commercial referencing, promotion, purchase and sale of goods and services on behalf of third parties; data processing and data collection for commercial and advertising purposes