Pre-Deployment Approvals are used to select the users who approve or reject deployments at this stage and set the time allowed for the approval. Gates are used to do Evaluation before the deployment. References: https://docs.microsoft.com/en- us/azure/devops/pipelines/release/approvals/approvals?view=azure-devops https://docs.microsoft.com/en-us/devops/develop/what-is-continuous-integration