The text discusses how continuous integration (CI) demands continuous testing and how shifting left can help prevent faulty code from spreading. It introduces Datadog's new Azure DevOps extension, which enables seamless incorporation of integration and end-to-end tests into existing CI/CD workflows on Azure Pipelines. The extension uses Datadog Synthetic Monitoring to bolster the shift-left strategy and proactively assess user experience at each step of the development process. It guides users through setting up the extension, implementing end-to-end tests in Azure Pipelines, monitoring test results, and optimizing CI pipeline performance using Datadog's CI Results Explorer and CI Visibility features. The text also mentions that Datadog offers visibility solutions for various CI providers, including Jenkins, CircleCI, GitHub Actions, and Azure Pipelines.