35 Advertising services in the field of of non-fungible token (NFT) multimedia files, non-fungible token (NFT) music files, non-fungible token (NFT) image files, non-fungible token (NFT) video files, non-fungible token (NFT) text files, non-fungible token (NFT) audio files, image, music, audio, video and multimedia files authenticated by non-fungible tokens (NFTs); Marketing services; Marketing services in the field of of non-fungible token (NFT) multimedia files, non-fungible token (NFT) music files, non-fungible token (NFT) image files, non-fungible token (NFT) video files, non-fungible token (NFT) text files, non-fungible token (NFT) audio files, image, music, audio, video and multimedia files authenticated by non-fungible tokens (NFTs); Promoting the goods and services of others; Sales promotion services; Sales promotion services for third parties; Advertising, marketing and promotion services in the field of of non-fungible token (NFT) multimedia files, non-fungible token (NFT) music files, non-fungible token (NFT) image files, non-fungible token (NFT) video files, non-fungible token (NFT) text files, non-fungible token (NFT) audio files, image, music, audio, video and multimedia files authenticated by non-fungible tokens (NFTs); Advertising, marketing, and promoting the goods and services of others via online website, promotional online art exhibitions and physical art exhibitions; Online advertising and marketing services in the field of of non-fungible token (NFT) multimedia files, non-fungible token (NFT) music files, non-fungible token (NFT) image files, non-fungible token (NFT) video files, non-fungible token (NFT) text files, non-fungible token (NFT) audio files, image, music, audio, video and multimedia files authenticated by non-fungible tokens (NFTs); Online retail store services rendered in a virtual environment featuring physical goods and virtual goods, namely, electronic publications, digital images, audio, video and multimedia files, computer graphics, digital collectibles, printed publications, books, game cards, magazines, pictures, posters, stationery, trading cards, bags, backpacks, wallets, blankets, clothing, hats, headwear, jackets, jerseys, pants, shirts, t-shirts, sweaters, sweatshirts, shoes, scarves, sneakers, socks, rugs, carpets.; 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; Publicity and sales promotion relating to goods and services available on-line