diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index db7800585..90b7dbad3 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -5,11 +5,12 @@ pool:
   #  - The build VM is deployed by Microsoft, reducing maintenance.
   #  - Tools within the VM Image are always up to date.
   #  - Fresh build environment for every run (to reduce contamination from other runs).
-  # https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops&tabs=yaml
+  # see: https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops&tabs=yaml
   vmImage: ubuntu-20.04
 
 # Adding extra information into build name, to make it easier to identify builds. 
 # It can be called using '$(Build.BuildNumber)'
+# see: https://docs.microsoft.com/en-us/azure/devops/pipelines/process/run-number?view=azure-devops&tabs=yaml
 name: $(Build.DefinitionName).$(SourceBranchName).$(Date:yyyyMMdd)$(Rev:.r)
 
 jobs:
@@ -17,23 +18,31 @@ jobs:
     displayName: Build Test and Deploy spring-petclinic Java Web App
     steps:
 
+    # Azure DevOps extension for configuring SonarCloud properties
+    # see: https://marketplace.visualstudio.com/items?itemName=SonarSource.sonarcloud
     - task: SonarCloudPrepare@1
       displayName: 'Prepare SonarCloud Code Analysis Scan'
       inputs:
+        # Azure DevOps Service Connection is used in place of secureSonar Token value within repo.
+        # For configuring, see: https://docs.microsoft.com/en-us/azure/devops/pipelines/library/service-endpoints?view=azure-devops&tabs=yaml
         SonarCloud: 'sonarcloud-svc-connection'
         organization: 'james-flynn-ie'
         scannerMode: 'Other'
         ProjectKey: 'james-flynn-ie_spring-petclinic'
         ProjectName: 'spring-petclinic'
         extraProperties: |
+          # see: https://sonarcloud.io/documentation/analysis/analysis-parameters/
           sonar.branch.name=$(Build.SourceBranchName)
           sonar.language=java
           sonar.projectKey=james-flynn-ie_spring-petclinic
 
+    # https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/maven?view=azure-devops
     - task: Maven@3
       displayName: 'Maven Build, Test and Package'
       inputs:
         mavenPomFile: 'pom.xml'
+        # 'clean install sonar:sonar' is required to run the Sonarcloud scan ('package' creates the JAR).
+        # see: https://www.coachdevops.com/2020/04/how-to-integrate-sonarqube-in-azure.html
         goals: 'clean install sonar:sonar package'
         publishJUnitResults: true
         testResultsFiles: '**/TEST-*.xml'
@@ -47,14 +56,14 @@ jobs:
         sonarQubeRunAnalysis: true
         sqMavenPluginVersionChoice: 'latest'
 
-    - task: SonarCloudAnalyze@1
-      displayName: 'Run Sonarcloud Code Analysis'
-
+    # Adds results and link to sonarcloud.io reports under 'Extensions' tab on pipeline run report.
+    # see: https://marketplace.visualstudio.com/items?itemName=SonarSource.sonarcloud
     - task: SonarCloudPublish@1
       displayName: 'Publish Quality Gate Result on SonarCloud'
       inputs:
         pollingTimeoutSec: '300'
 
+    # https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/copy-files?view=azure-devops&tabs=yaml
     - task: CopyFiles@2
       displayName: 'Copy Files to artifact staging directory'
       inputs:
@@ -63,7 +72,8 @@ jobs:
         TargetFolder: $(Build.ArtifactStagingDirectory)
         preserveTimestamp: true
 
-    # Publish build artifacts to Azure Pipelines. Extension uses Robocopy "under the hood."
+    # Publish build artifacts to Azure Pipelines (Continuous Delivery).
+    # Build artifacts are retained and can be downloaded for local use, or used in other stages or pipeline runs for deployments.
     # https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/publish-build-artifacts?view=azure-devops
     - task: PublishBuildArtifacts@1
       inputs:
@@ -73,13 +83,20 @@ jobs:
         parallel: true # Increased speed through multi-threaded copying.
         parallelCount: 8 # Dependent upon CPU capabilities.
 
+    # Deploy JAR into Azure Web App Service https://docs.microsoft.com/en-us/azure/app-service/overview
+    # Azure App Service offers a Web application hosting Platform-as-a-Service, offering:
+    #  - Security
+    #  - Load balancing
+    #  - High Availability and autoscaling (based on policies)
+    # For pipeline configuration, see: https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/deploy/azure-rm-web-app?view=azure-devops
     - task: AzureWebApp@1
       displayName: Deploy spring-petclinic to Azure Web App service
       inputs:
+        # For configuring Service Connection, see: https://docs.microsoft.com/en-us/azure/devops/pipelines/library/service-endpoints?view=azure-devops&tabs=yaml
         azureSubscription: 'azure-svc-connection'
         appType: webAppLinux
         appName: 'james-pet-clinic'
         package: '$(System.DefaultWorkingDirectory)/**/*.jar'
       # Only deploy web app from main branch (for release purposes)
       condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/main'))
-  
\ No newline at end of file
+...