component
A reusable building block for a screen, such as a button or header, defined once and used many times.
Like a LEGO brick that snaps into many models. A component is a self‑contained piece of the app’s interface, which is what people see and tap, with its own look and behavior.
Components matter because they let you build faster and keep things consistent. Change the component once and every place that uses it improves, which cuts bugs and design drift.
In practice you use built‑in pieces like Button and TextInput and you make your own, such as Paywall or ProfileCard. You pass props, which are settings you hand into a component, like title text or a color.