Advertising, namely, online advertising and publicity that allow users to perform electronic business transactions in the field of ecommerce, namely, promoting goods and services of others by creating business-to-business communities to connect buyers and suppliers; business management, namely, on-line business management and consultancy services; electronic business appraisals; business administration and office functions, namely, on-line commercial administration services and administrative processing of orders by electronic platforms; electronic tenders management in the nature of management of procurement proposals, namely, procuring of contracts for others for the purchase of goods and labor contracting services; electronic negotiation and contracting management procedures concerning the sale of goods or services, namely, negotiation and settlement of commercial transactions for third parties; invoicing, namely, electronic invoicing