First before anything a lot of employees have to work through a temp service and a slim number get hired on directly through amazon itself. After you're hired by the temp service you have to perform your job to the best of your ability and hit a daily rate in either pack, pick ,stow etc.If you are up to performance and can hit the rate you might be eligible for employment through amazon. After hired you will receive benefits, a pay raise ever six months and will receive a raise up to $15 per hour as a tier one employee unless you get a promotion to tier 3 which I find honestly hard to do. Favorites come into play here and only very few employees get this change to advance within amazon.