What tasks is Nginx used for and what problems does it help to solve?

Nginx is used for tasks related to web servers and load balancing. Main applications:

• Serving static content (images, CSS, JS) with high performance.
• Reverse proxy for distributing requests among multiple backend servers.
• Load balancing to improve fault tolerance and scalability.
• Caching responses to reduce backend load.
• SSL termination — handling HTTPS requests.

Problems that Nginx helps to solve:

• High load and the need for scaling.
• Slow backend services.
• Security through access restrictions and request filtering.
• Managing a large number of concurrent connections thanks to its asynchronous architecture.

Example: if you have several microservices in Go, Nginx can accept all incoming requests and distribute them among the services, cache frequently requested data, and provide HTTPS.