This highly useful 42 page eBook provides an overview of Azure Database for PostgreSQL and the value that it provides as a fully managed, open-source database service, including key use cases and an introduction to common application hosting environments. It also covers the various deployment options for Azure Database for PostgreSQL and introduces the key concepts you’ll need to understand to best put each deployment option to use. Also includes links to other resources to help and inform.
https://azure.microsoft.com/en-us/resources/introduction-to-azure-database-for-postgresql/