What does the following AWS CLI create-service command for ECS do?

aws ecs create-service \
 --cluster production \
 --service-name rest-api \
 --task-definition rest-api:1 \
 --desired-count 2 \
 --launch-type "FARGATE" \
 --network-configuration \
 "awsvpcConfiguration={subnets=[subnet-0b29129ab],securityGroups=[sg-0b29129ab]}"