1Self.World is a startup based on Web 3.0 blockchain technology that aims to solve the problem of inefficiency in the advertising and marketing market due to individuals not owning data. 1Self.World provides a platform where users and advertisers can meet directly, allowing individuals to own the data, channels and profits monopolized by the platform. Using SBT (Soul Bound Token), which cannot be transmitted or traded using Web 3.0 technology, information about personal tastes and interests is recorded on the blockchain and stored in a personal database so that users own their own data. Advertisers can target users (Web 3.0 identities) based on SBT tokens and digital assets and interact directly with users through SBT and NFT-based groups.