A5: WebAssembly (Wasm) is a binary instruction format that enables high-performance execution of code in web browsers. By running code written in programming languages like C++, Rust, and Go, WebAssembly allows web applications to perform complex tasks such as real-time image processing and 3D rendering with near-native speeds. Wasm opens up new possibilities for building sophisticated functionalities on the web, elevating user experiences to new heights.