Sample of multistage pipeline

xyz-publish-pipeline.yml

trigger:
  branches:
    include:
      - master

pool: "Default"

variables:
  displayName: My Awesome project
  csprojPath: MyProject.csproj

stages:
  - stage: Build
    jobs:
     #  build jobs

  - stage: Test
    dependsOn: Build
    jobs:
      #  test jobs

  - stage: Staging
    dependsOn: Test
    jobs:
      #  staging jobs

  - stage: InternalDeploy
    displayName: "[Internal] deploy"
    dependsOn: Staging
    jobs:
      - deployment:
        displayName: "Deploy XYZ"
        environment:
          name: Internal
        strategy:
          runOnce:
            deploy:
              steps:
                - template: publish-template.yml

  - stage: PoblicDeploy
    displayName: "[Public] deploy"
    dependsOn: Staging
    jobs:
      - deployment:
        displayName: "Deploy XYZ"
        environment:
          name: Public
        strategy:
          runOnce:
            deploy:
              steps:
                - template: publish-template.yml