# Decentralized Digital Identity (Wallet) A wallet also acts to provide a digital identity so that you can easily login to a range of decentralized applications. Instead of usernames and passwords for each site, you can login using your wallet's cryptographic key. This makes navigating between different exchanges, NFT marketplaces, and games very easy, although you may need to manually switch between the blockchains, when traversing from an Ethereum-powered site to one using BNB Smart Chain for example. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bitdrive.finance/web3-guide/decentralized-digital-identity-wallet.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.