text: The*invocation event*contains data, as a JSON packet, which varies from service to service. For 
  
  example, API gateway events include path, HTTP method, query string parameters, headers, 
  cookies, and more. DynamoDB events could contain updated or delete record data. S3 events 
  
  include the bucket name and object key, among other things. 
  
  *The context*contains information about the environment the function is running inside. Additional 
  
  contextual information can be set in familiar environment variables (ENV). 
  
  The function*handler*is a method in your function code that processes the inbound event. The 
  
  handler, which is a standard function in your language of choice, does some work and emits a*result*
  
  *event*. 