The versatility of packet sniffers means they can be used to:

These software programs are called packet sniffers and many can be downloaded free online.

There is far too much data gathered by these packet sniffers for human investigators to manually search through all of it.

This has been shown to be exploitable with a simple packet sniffer.

In the end, a packet sniffer gets you everything.

Otherwise all data being sent would be readable by use of simple packet sniffers which could reveal sensitive information.

Any packet sniffer can be set to look for certain patterns of characters or data.

A packet sniffer can usually be set up in one of two ways:

Fair enough, except I do know how to use a packet sniffer.

Note that you may be confused about what you're even seeing in your packet sniffer.