> For the complete documentation index, see [llms.txt](https://docs.rei.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rei.network/rei-network/introduction-to-usdrei.md). # Introduction to $REI ## What is $REI? `$REI` is the native token of REI Network which secures the running of REI Network. `$REI` has the following usages: * **Gas Fee**: When you send transaction on the REI Network , you can pay a small gas fee using `$REI`, This fee is a reward to the node for processing and verifying the transaction. * **Governance Token**: `$REI` can be used for REI DAO management, `$REI` holders can commit proposals and vote for system level proposals on * [**Validator Pledge Token**](/rei-dao/guides/become-a-validator.md): `$REI` can be used as a pledge token for node who want's to become a validator of REI Network * [**Voting token**](/rei-dao/guides/voting-for-a-validator.md): `$REI` is the only voting token for node election * [**Stake for Free Gas**](/rei-dao/guides/stake-for-free-gas.md): `$REI` holders are able to stake `$REI` to own `$Crude`, which can be used instead of gas ## What is the responsibility of the $REI holder? * The responsibility of REI holders is primarily to ensure the stable and secure operation and ecological growth of the REI Network public chain by building governance processes and infrastructure that work, and to defend against proposals that do not support the core objectives of governance, which is in the core interest of REI holders. * REI holders need to openly communicate and express their views on the various issues being addressed by REI governance at any given time and seriously participate in the forum discussions; the content of the proposal and the logic behind it is one of the main criteria for measuring the quality of the proposal. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.rei.network/rei-network/introduction-to-usdrei.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.