how to understand a handshake

[12monkeys]

Im using wifite.py to get handshakes. Ive seen somewhere that people are using wireshark to check If they got googhandshake. I also used pyrit analyze command but still I dont know what should i expect... Maybe someone can explain. Ive already catched more than 50handshakes for different ssids but never cracked any of them. I think it is bad handshake rather than bad wordlist.