Routes define how your backend responds to different requests. Each route is connected to a specific HTTP method and path.

In Nest.js, routes are created inside controllers using decorators.

Here is an example:

import { Controller, Get, Post } from '@nestjs/common';

@Controller('users')
export class UsersController {
  @Get()
  getAllUsers() {
    return 'Get all users';
  }

  @Post()
  createUser() {
    return 'Create user';
  }
}

• @Controller('users'): sets the base route;
• @Get(): handles GET requests to /users;
• @Post(): handles POST requests to /users.

Each method inside the controller becomes an endpoint.

You can also define routes with additional paths:

@Get('profile')
getProfile() {
  return 'User profile';
}

This creates the route:

/users/profile

Each route responds to a specific combination of:

• HTTP method;
• URL path.

This allows you to define different behaviors for the same route depending on the request type.