Azure DevOps Organization vs Project

Azure DevOps Organization is nothing but a collection of projects and it generally begins with url like https://dev.azure.com/orgname. There might be one or more projects inside an Azure DevOps organization and each project inside an organization will have a separate Boards, Repos, Pipelines, Test Plans and Artifacts. And the projects will be independent of one another

In another words, a project exists in an Azure DevOps organization and it’s within the organization and each project has their own url which also includes organization name and the url would be something like https://dev.azure.com/orgname/project1, https://dev.azure.com/orgname/project2 etc.,

A project in Azure DevOps can be managed by an project administrator whereas organization could be managed only by project collection administrator (Org Admins). And the org admins will have all full access to all the projects within an Azure DevOps organization (In short Org Admins can be also Project Admins)