Greengrass is a new component within the AWS family. AWS Greengrass extends AWS IoT cloud capabilities to local devices. Sometimes, it is not possible to process all the data on the cloud itself, so instead, we need to collect and analyze data closer to the source of information.

In other words, developers can use AWS Greengrass to run serverless code (AWS Lambda functions) in the cloud and conveniently deploy it to devices for local execution of applications. AWS Greengrass also has great support for machine learning inference. Greengrass is accessible from the menu on the left side of IoT Core under the Manage devices section.