The bottom line though is that if you take online poker seriously, and you plan to multi-table, there is no doubt that using a good HUD is going to help you tremendously. Because it gives you pinpoint reads on every single player at your tables which also get updated in real time as you play more hands against them.
The game of poker involves both luck and skill. In the short term, luck can play a significant role in determining the outcome of individual hands or sessions. However, over the long term, skill becomes a more important factor in determining success in poker.