Connectors are Azure resources that help connect a logic app to external services. These services could be in the cloud or on premises. For example, there is a connector for connecting Logic Apps to Event Grid. Similarly, there is another connector to connect to Ofifice 365 Exchange. Almost all types of connector are available in Logic Apps, and they can be used to connect to services. Connectors contain connection information and logic to connect to external services using the connection information.