The concept of a Start-up business in the Republic of Croatia is relatively new and extremely interesting idea. It is irrelevant if it refers to a new company or a company that that competes with something entirely new- it is certain that the market is developing very quickly. In the rest of the world that concept is already known so the fact that companies that have made a million worth projects are known by it doesn't surprise us. Some of the companies are Instagram and Whatsapp. But that companies wouldn't have profited so much if they hadn't recognized the global desires and needs from customers, e.g. its target markets. Accessibility, simplicity, and functionality is their ultimate goal. Just like any, the Start-up company depends of quality marketing and its conception. Our days it is very hard for the companies to find a right place with an acceptable price but with a successful promotion for presenting their products and services. In many TV shows, magazines and internet pages that work in the purpose of advertising, hundreds of competitors clash. High prices that are attached to advertising do not fit the companies, especially the smaller ones that don't have enough financial resources for that kind of advertising. Orientation on a certain group i.e. segment of consumers and pleasing their wishes requires a lot of effort, work and dedication, but in return there is accomplishment of planned goals and a satisfied consumer. The object of marketing can be anything, from touchable (material) things to services, ideas, experiences, events etc., but it is very important that the company always has something that the potential consumer is interested in. With the development of the technology for satisfying the targets market wishes develops an implementation of marketing. Despite the still great representation of „classic“ marketing, for the last few years internet marketing, especially advertising, is positioned amongst the ones leading to success.