# What Is Accumulator? Accumulator is a Decentralized Yield Optimizer on IOTA and Shimmer EVM that allows it's users to earn compound interest on their crypto holdings. Accumulator earns you the highest APYs with safety and efficiency in mind. Through a set of investment strategies secured and enforced by smart contracts, Accumulator automatically maximizes the user rewards from various liquidity pools (LPs),‌ ‌automated market making (AMM) projects,‌ ‌and‌ ‌other yield‌ farming ‌opportunities in the DeFi ecosystem. The main product offered by Accumulator are the Vaults in which you stake your crypto tokens. The investment strategy tied to the Vault will automatically increase your deposited token amount by compounding arbitrary yield farm reward tokens back into your initially deposited asset. Despite what the name Vault suggests, your funds are never locked in any Vault on Accumulator: you can always withdraw at any moment in time. DeFi applications are unique in the sense that they are permissionless and trustless, meaning that anyone with a supported wallet can interact with them without the need for a trusted middleman. While you have funds staked in a vault, you remain 100% in control of your crypto. --- # 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://accumulator.gitbook.io/accumulator/what-is-accumulator.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.