When we are stuck with an issue that requires deep packet inspection, we capture the traffic with Wireshark, which allows us to resolve it.  

It's an efficient solution for determining unexplained issues. It helps us rule out the network as the cause of an issue. When people don't know the reason for a problem, they always believe it's the network. Wireshark enables us to prove ourselves to the other teams. 

It gives us the ability to pinpoint problems and to communicate network problems with software and hardware vendors. The packets never lie!

It helped in the sense that it allowed the team to troubleshoot networks faster. While I worked at Verizon, our group was able to provide network analysis of our testbed which gave us an advantage over most test groups. This was because we could follow a packet throughout the network to examine the treatment that the packet was receiving in the network. The improvement came when we realized that through the use of this method we could duplicate the results of using a much more expensive version of our program called RMON.

It has help me to 

• solve network and transaction issues
• understand protocols and application communication
• check quality
• solve security issues. 

The people to whom I have introduced this product have found it a great tool to analyze packets. Instead of troubleshooting by trial and error, they have a way to investigate, verify, and then apply a solution. Of course, to derive value from the product, you must know its features.

In order to be more intelligent about all the bits/frames/packets/data traversing your network regardless of how small or large the network is, Wireshark is a network analytic tool which provides such an intelligent information in a network.

Wireshark is that intelligent, not only for production environment alone but also aids study about the packet fields that may exist in any type of packet header of data flowing in your network.To view how all the classes of QoS marking in a packet are and can be used to also sniff packets during reconnaissance phase of a network security attack.

Wireshark provides better understanding on how the bits are set for different fields in a packet header.

It is indeed a very good tool which all network administrators need to be familiar with.