Explore location-based Next.js Middleware and New Relic Synthetics in this comprehensive video tutorial. Learn how to control app behavior based on user location, set up synthetic tests, and implement middleware for location-specific functionality. Discover techniques for testing buttons as if you're in different countries, using Vercel for deployment, leveraging imgx with Unsplash, and implementing conditionals. Gain insights into Vercel logs and find resources for further learning about synthetics. Follow along with practical examples, including a food-themed application, and understand how to effectively test and monitor location-based settings in your Next.js applications.