Those sounds that are music to a canners ears. It means that all your hard work has paid off and your jars have sealed. People can get caught up in the excitement of what they are putting in the jars and all the prep work but if you don’t take the important steps before hand, of sterilizing and, afterwards of boiling your lids, hot water bathing etc. then it was all for nothing. Your time, the cost of the product and frankly the frustration. All I can say is be meticulous and the pay off will be well worth it.