azure pipelines extends:

• https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema/extends?view=azure-pipelines

template:

Related

• trigger:

See also

• Azure Pipelines: az pipelines, trigger:, stages:, variables:, parameters:, inputs:, group:, template:, jobs:, job:, steps:, dependsOn:, task:, condition:, resources:, pool:, stage:, extends:, deployment:, scriptType:, inlineScript:, repositories:, pr:, repository:, type:, Default Azure Pipeline, Azure Pipeline Library, Azure Pipeline Job full syntax