Free spins are a type of promotional offer that you can get when playing at an online casino. Simply put, you get a certain number of attempts in advance that can be used on a particular slot machine. They come in the form of no-deposit bonuses or as part of deposit bonus packages.
An annual bonus of 5-10% of your yearly salary is standard in a lot of industries, just as a 5-10% annual raise is considered standard. However, if you work on commission, you may see a significantly higher percentage. Your industry, company revenue, location, and level also heavily inform what's expected.