title: What does visibility Timeout mean for AWS SQS
body: <p>What is the meaning of "Visibility Timeout" for Amazon SQS service ? What factors determine an ideal value for this field ? </p>
  
  <p>I have looked at <a href="http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/Welcome.html" rel="noreferrer">http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/Welcome.html</a> </p>