Originally Posted by Deep Bhavsar
What is a HUD and how does it works, can anyone tell me about this..
HUD stands for head-up display. To put it in a pratical way, it displays statistics on how your opponent plays on your screen, like how aggressive he is, how many percentage of hands he plays, how much he calls preflop,etc. The HUD helps you figure out what kind of player he is( TAG, LAG, fish,...) and adjust optimally to his play. You can see how useful this can be if you know how to use it.
I'm going to put some links if you didn't fully understand the concept.
wikipedia (general concept of the HUD): https://pt.wikipedia.org/wiki/Head_up_display
Poker related HUD: http://www.pokersoftware.com/categories/huds.html