When signing up with a bookmaker or a casino, you will want to get your start bonus in those areas where this is possible.
To get Bet365 bonus, Bwin bonus or from any other operator, you will most typically need to open an account and make a deposit. Typically the bonus is different from country to country, but normally it will be a first deposit bonus. For this type, you will get around 50-100% of your initial deposit, which will arrive in your account short time after you making your qualifying deposit into your account.
So if you deposit 1000, then you will get a 1000, but only if the the rules state that the maximum is not less. Also, you will need to read the rules for turnover for such bonus, as you cannot just deposit 1000, get a 1000 in bonus and then withdraw 2000 into your bank account.
In general the rules of the bookmaker or casino will tell you how many times you have to wager the bonus and deposit beforeyou can make a withdrawal. For casinos the standard is around 35 times, while sportsbooks is more in the region of 4-8 times. For casinos you also need to read about any games not counting for turnover, which often is roulette and blackjack.
For sportsbooks it will be important to find out what minimum odds is required in order for the bet to count towards the completion, since many operate with minimum odds such as 1.40 or 1.80.
But most important is to make the most of your bonus, since this is only offered once when you make you initial deposit. So if the maximum bonus you can get according to the rules are 1000 kroner, 100 pounds or similar, then make sure that you first deposit supports the full amount of the bonus.