This is a very important question because the distinction between bad, average and excellent online casinos is enormous. Obviously you only ever want to gamble online at the world's best online casinos. It's not so much about what bad or average online casinos have that makes them mediocre, but more importantly what they don't have or lack. In other words, excellent online casinos boast certain criteria and features that puts above way above most other casinos.
For instance, the best online casinos in the world are licensed and regulated to ensure that they are fair, honest and are operated with integrity. There are many top online gambling jurisdictions around the world that license online casinos, including Kahnawake (Canada), Costa Rica, Antigua and Barbuda, the Isle of Man and Gibraltar to name a few. Online casinos that are licensed will feature the name of their licensing jurisdiction on their homepage so you can check for yourself.
Next, look at the online gambling software that the online casino is powered by. There are many gambling software firms in operation today, but arguably five of the best are Microgaming, Playtech, RealTime Gaming, Cryptologic and Rival Gaming. Online gambling software is what drives any online casino. So the better the software, the better the games. Also look at a casino's progressive games. The rule of thumb is the higher the jackpots, the better the games and thus the casino.
Top-rated online casinos usually boast extremely generous bonus offers. These can be in the form of No Deposit Bonuses, Welcome Bonuses, Sign-Up Bonuses, Monthly Bonuses, Reload Bonuses, High Roller Bonuses and many more. All bonuses are designed to attract new players to online casinos, and ongoing bonuses are designed to keep players playing at the casinos. So it's not surprising that the best online casinos are renowned for their high numbers of repeat or loyal players.
The best online casinos are also well-known for their around the clock customer care facilities which are manned by well-trained and motivated personnel. It is their job to help you quickly and efficiently whether you have any questions, queries or issues that need addressing. Great online casinos understand the importance of looking out for the interests of their players, as opposed to bad or average online casinos that don't seem to care either way, and thus have poor player retention.