Exciting times lie ahead! In this lesson, we'll be mastering the concept of dynamic rendering in React. You're about to discover how to fetch data from an API and use it to create highly responsive applications. By the end, you'll be capable of implementing a search input that fetches and displays data according to user input.

Dynamic rendering is an approach providing real-time updates to UI elements based on data changes. Picture a weather forecast app that fetches real-time temperature data and updates it on the screen – that's our goal today. In React, dynamic rendering is achieved by updating a component's state and making corresponding adjustments in the UI.

Let's utilize the Fetch API to fetch some data from an API endpoint:

The code above prints data from the API as JSON, effectively pulling up new data from the API.

Our focus now shifts to a real-world scenario. Visualize creating an input field where users type in a user ID. When the 'Search' button is clicked, the app fetches the user's corresponding posts, stores them in the state, and then renders this new data.

Here's a React component to illustrate this concept: