What is renderer in lightning component?

Q : What is renderer in lightning component?
Q : Lightning 구성 요소의 렌더러 란 무엇입니까?

A : When a component is rendered or rerendered, the aura:valueRender event, also known as the render event, is fired. Handle this event to perform post-processing on the DOM or react to component rendering or rerendering. The event is preferred and easier to use than the alternative of creating a custom renderer.
A : 구성 요소를 렌더링 하거나 다시 렌더링 하면 render 이벤트라고도 하는 aura : valueRender 이벤트가 시작됩니다. 이 이벤트를 처리하여 DOM에서 사후 처리를 수행하거나 컴포넌트 렌더링 또는 렌더링에 반응합니다. 이 이벤트는 커스텀 렌더러를 만드는 것보다 선호되고 사용하기 쉽습니다.