The benefits of staggering your entry are that you minimize your risk since you do not place one single entry, and that this will maximize your profits by placing multiple entries in your trading. By having a solid trading strategy it will produce best results and that by maintaining your trading plan only a few minor change can be made in staggering your entry levels.
By doing so it lessens the risk of losing, it mitigates that risk by using staggered trade entry tactics. However, lesser traders attempts to manage their entries by taking a position at some points of resistance or support and then adding size to that trade as price move against their initial stage. For more details and examples, try to read the following articles.