The most common bonus you will come across is the welcome bonus. This is simply the first bonus offered to new online casino customers. It can take any form really, but most common are the match bonus and the free spins bonus. It is only offered to players who have never created an account before at that particular online casino. If you have registered an account at that casino – even if it was years ago and you haven’t played on the casino for ages – you will likely not be eligible for any new welcome bonuses. You can, however likely be eligible for a reactivation or reload or deposit bonuses if those are offered at the online casino in question.
Another important note: a welcome bonus is usually offered at every online casino and you aren’t in any way restricted from signing up at as many online casinos as you want. That means you can literally collect thousands of dollars in sign-up bonuses if you create at several online casinos. Fair warning, though: most welcome bonuses have play through or wagering requirements and you won’t just be able to create 100 new accounts and cash out the bonuses for profit. That would just be too good to be true, right? But that said, if you enjoy playing at a variety of online casinos you can reap the rewards in the form of multiple casino bonuses.