Most online casinos will offer bonuses to get new players in and to keep existing players. These can be really good for many reasons. They will mean that you will be able to get some free games so that your money will last longer. You will also be able to spend it when you are just getting used to a new casino and so if you make mistakes and spend it unwisely, you will not feel so bad as if you were spending all of your own money.
There are some websites which keep up to date with the bonuses that casinos have. They will list them so that you can go and compare them and choose the casino that has one that you would like to try. This will allow you to see which has the highest and you could always sign up to several and therefore take advantage of more than one bonus.
However, if you want bonuses once you become a member this can be more tricky to find. Casinos seem to be keen on getting in new customers, but do not have so much consideration for existing ones. Some people like to just stick with the same casino and therefore would like one which offers them bonuses from time to time. Some will do this and so you will need to see if you can find them. You may find that some review websites will have details of these. Otherwise you could try asking people that you know that play on casino websites or look on forums or message boards.
The thing to be careful about with bonuses is that they will change over time. This means that a casino that offers great bonuses at one time may not be so good in the future. Therefore you need to make sure that you look at up to date information when you are looking at reviews and finding out about bonuses. You could even do some of the research for yourself, but this will be time consuming and you may rather just be playing the games than doing the research.
So although there are quite a few places you can look to find out more about bonuses, they may not be up to date. You need to decide if you want to go with the casino that has the highest or try several. It is worth remembering that you should be having fun when you are playing in the casino and therefore it should not only be the size of the bonus which influences which casino you choose to play in. You need to think about the types of games they have, their themes, whether they look fun and maybe even the jackpots and prize values.