One of the great aspects of online play is the ability to set up All-In, or disconnect, protection during a session. Due to instability of technology an internet connection could be lost at any time, and there is no worse feeling than losing a huge pot because your internet provider decided to reset! If you have All-In protection available, if your internet connection crashes, your action in the hand will be frozen and you will still be eligible to win the amount of the pot before you lost connection.
Example, if the pot is $50 and your connection freezes, the $50 will still be credited to your account (assuming you won the hand).
Make sure you have your All-In protection reset at all times. Most sites will tell you in the lobby how many All-In protects you have, and will allow you to reset this number at any time.