Props allow the same [React](/courses/reactjs) component structure to work with different data. Without props, a component may be tightly coupled to one value: ```jsx function UserCard() { return

Asif

; } ``` That component cannot easily display another user. Instead, accept data through props: ```jsx function UserCard({ name, role }) { return (

{name}

{role}

); } ``` Now the component can be reused: ```jsx ``` ### Component Structure Stays the Same The important relationship is: ```text Component + Different props ↓ Different UI instances ``` The parent controls the data while the child controls how that data is displayed. ### Props Can Carry More Than Strings Props can include: ```text Strings Numbers Booleans Arrays Objects Functions React elements Other components ``` For example: ```jsx ``` ### Props Should Represent a Clear API A reusable component should expose meaningful props: ```jsx ``` rather than forcing every parent to understand the component's internal implementation. ### Avoid Excessive Configuration A component with dozens of unrelated props can become difficult to maintain: ```text Reusable does not mean configurable in every possible way. ``` Sometimes composition or multiple specialized components produce a cleaner design. ### Interview-Ready Answer Props make [React](/courses/reactjs) components reusable by separating a component's structure and behavior from the data supplied by its parent. The same component can render many different instances by receiving different props. Good reusable components expose a small, meaningful API instead of hardcoding data or providing excessive configuration.