How can you implement caching in a Node.js application?

Caching can be implemented using in-memory solutions like Redis or in-process caching with libraries such as node-cache. This helps reduce load times and improve performance by storing frequently accessed data. Example using Redis for caching:

const redis = require('redis');
const client = redis.createClient();

client.set('key', 'value', redis.print);
client.get('key', (err, reply) => {
  console.log(reply); // Will print 'value'
});