One of the best ways to advertise your bounce house rental business is through social media. You can use Facebook and Twitter to post updates about your company. You can also create your own social media profiles. In order to increase your reach and build word of mouth, give your customers a reason to recommend you to their friends. For instance, you can offer referral rewards like a 10% discount or a $10 Starbucks gift card. By creating a social profile for your business, you can reach your target audience with a small amount of money.