Social sites have changed the way we look at the world around us. Nowadays more and more users actively communicate with other users and they are also participating in creating and sharing content with each other, they are connected through different social sites which allows them to get any information at any moment. Biggest role when it comes to that have advertising because many companies are becoming successful for having their own web site or a profile on social sites, and of course goal of every company is to be present on digital platforms such as Facebook or Twitter so it could attract as many users that will visit the site or click on some advert. And the thing which is very important for users today is interaction, sincerity, and offered content that will be useful and entertaining to them, otherwise they start losing interest. Knowing and understanding target group is the main factor for targeting, making adverts, and communication on social sites in general. With the growth of social sites the competition is also growing and we need to have in our minds to develop a good communication strategy and specific budget that is intended to be invested in advertising because only with a good strategy and with a good quality content we can survive on the market, and with a lot of effort its always worth to make an investement in advertising on social sites.