More detailed description below:
Welcome Bonus
Welcome bonus is there to welcome you to the site and is therefore only available to newly registered players of the casino. In many cases, this type of bonus will be very extravagant, giving you a huge booster to start out with.
Sometimes, the welcome offer can expand across your first multiple deposits made, with free spins on slot machines also thrown into the mix at some casino sites. The bonus is often given as a percentage of the amount that you deposit, so it is not uncommon to find a welcome bonus in the form of a 100% bonus on top. The casino should also clearly state the maximum bonus funds that you can obtain from claiming such a reward, too.
No Deposit Bonus
To claim no deposit bonus, you don’t need to make any sort of deposit into your casino account. Instead, you will simply be given a perk for logging in.
Usually, no deposit bonuses are provided to players who have just completed their registration and verified their account.
A no deposit bonus is frequently provided as a small bonus amount, such as $5 or $10, or a small batch of free spins to use on a single slot game.
Free Spins
Free spins are solely usable on slot machines, and it is often the case that the casino will pick one or two specific slots that these are available for, too. Sometimes, a welcome package will provide free spins on different games with each subsequent deposit made.
These basically allow you to spin the slot game’s reels for free, without using your own deposited money.
Of course, it is usually the case that you must have made the minimum qualifying deposit to have these added to your casino account.
Cashback
While not really being a bonus, cashback is one of those promotions that nobody should miss out on. If it is offered, it will usually be done so as a wager-free reward.
In short, a cashback offer takes your net losses over the past week or two and then gives you a percentage of them back as real money.
So, if a site provides a 20% cashback offer on net losses from the previous week and you have lost $500, then you get $100 in real money to either withdraw or use on the games as you would like.
High-Roller Bonus
High-roller bonus operates in the same vein as the standard type of bonus, but it caters more specifically to those players who like to deposit large amounts.
So, let’s say the general average deposit at a casino from players is $100, then they may get a bonus of 100% up to $200 on top. A high-roller could potentially receive an offer of 200% up to $1,000, as long as they make a deposit into their account of at least $500, for example.
Reload Bonus
After you have obtained the welcome bonus and/or free spins, a reload bonus may become available to you. This caters to all regular gamers at an online casino. Every time you deposit money into your account, you will be given a percentage on top of it as a bonus. This will usually be a lower amount than the welcome offer, both percentagewise and maximum bonus funds-wise. However, it can still provide a nice boost to your balance.