A mobile app is a software application that runs on a smartphone or tablet. It can be downloaded from the Apple App Store, Google Play and other similar platforms. Mobile apps are used for business-related purposes such as sales, marketing and customer service. They can also be used for entertainment purposes like watching videos or playing games. The main reason why businesses need to have their own mobile app is because it helps them reach out to more customers than before by making it possible for them to access information about the company anytime anywhere in any part of the world where there's internet connection available on their smartphones or tablets so as long as they have access to these devices then they'll always be able to find out what's happening at your company whether it's new products available or promotions going on etc., which means that no matter where those potential customers live they'll always know when something happens within your business without having any trouble finding out about anything related directly back here at home base headquarters location which could make all difference between success versus failure when competing against other businesses who might not have thought about getting themselves set up properly yet!