On-line advertising-related services for others; advertising; business management; management of on-line advertising on computer networks; data management services for use in on-line advertising inventory supply chain operations; advisory services relating to business management of on-line advertising; providing advertising services and digital advertising services and distribution of advertising materials; providing advertising services and digital advertising services and distribution of advertising materials via the Internet, mobile, video, and other digital formats; ad serving, namely, placing advertisements, videos, and advertising content on websites for others using specialized computer software; digital advertising inventory management; data optimization in the nature of analysis of business data relating to advertising performance; providing advertising services and digital advertising services, namely, serving, targeting, and tracking of advertising materials; providing advertising services and digital advertising services, namely, tracking, reporting, and billing of advertising expenditures; providing advertising services and digital advertising services, namely, tracking, reporting, and quality certification of advertising performance; Providing advertising services and digital advertising management services using distributed ledger technologies, for example, blockchain technologies. Business analysis software for digital advertising and digital marketing purposes; software for creating, tracking, billing and managing advertising and marketing strategies including on-line advertising campaigns; computer programs for displaying advertisements on electronic communication networks including in response to characteristics of users with access to electronic communication networks; statistics and audience rating computer programs for advertising and marketing purposes; business analysis software for managing, tracking, and billing digital advertising using a distributed ledger technologies, for example, blockchain technologies. Providing access to online databases featuring digital advertising data; providing access to online databases featuring digital advertising data using distributed ledger technologies, for example, blockchain technologies. Providing on-line non-downloadable software for optimization of on-line advertising; providing a platform as a service and computer services featuring digital advertising technology to optimize digital content, including for internet, mobile, video and other digital formats, that enables users to perform digital advertising inventory management, manage digital advertising representation, distribution, serving, audience targeting, tracking, billing, reporting and quality certification; providing a platform as a service and computer services featuring digital advertising technology using distributed ledger technologies, for example, blockchain technologies; engineering services, namely, evaluations, appraisals and research in the field of computer and information technology; design and development of computer software and computer hardware systems, algorithmic program and new technologies using a distributed ledger technologies, for example, blockchain technologies in the field of advertising and promotional services for others; platform as a service (PAAS) featuring computer software platforms for buyers and sellers of online advertising to build, manage, purchase, track and optimize online advertising campaigns using a distributed ledger technologies, for example, blockchain technologies. Consulting services in the field of digital advertising campaigns; consulting services in the field of digital advertising campaigns relating to use of distributed ledger technologies, for example, blockchain technologies, to manage, purchase, track digital advertising campaigns. Financial services; providing a digital currency or digital token for use by members of an on-line community via a global computer network; a digital currency or digital token, incorporating cryptographic protocols, used to operate and build applications and distributed ledger technologies, for example, blockchain technologies, on a decentralized computer platform and as a method of payment for digital advertising services and inventory; financial transaction processing services, namely, clearing and reconciling financial transactions via computer and communication networks; electronic processing and transmission of bill payment data for users of computer and communication networks; electronic funds transfer services; bill payment services; financial exchange services, namely, providing a virtual currency for use by members of an online community via computer and communication networks; issuance of tokens of value; issue and redemption of tokens of value; issue of tokens, coupons and vouchers of value; issuing gift certificates which may then be redeemed for goods or services; issuing of cash vouchers; issuing of discount coupons; issuing of payment gift cards; issuing of payment gift vouchers; issuing of tokens of value in relation to incentive schemes; issuing of tokens of value in relation to customer loyalty schemes; issuing of vouchers; issuing of vouchers for use as money; providing information relating to the issue of tokens of value; financial services, namely, providing a virtual currency for use by members of an on-line community via a global computer network; financial services, namely, providing electronic transfer of a virtual currency for use by members of an on-line community via a global computer network; credit card payment processing services; providing electronic processing of electronic funds transfer, ach, credit card, debit card, electronic check and electronic payments. Providing on-line electronic publications, not downloadable; providing on-line electronic publications, featuring strategies for managing, purchasing, and tracking digital advertising campaigns using distributed ledger technologies, for example, blockchain technologies