This paper focuses on the importance of social networks in the marketing context. In the first and second chapters, social networks were discussed in general, their development through history, importance, and their marketing context. In addition, the third chapter was related to Facebook, where its features and promotion tools were developed through the same. Furthermore, the basic aim of the paper was to conduct a survey questionnaire and explore user attitudes and identify opportunities to improve the effectiveness of promotional activities. So, a survey was conducted to get relevant Facebook perception of social networking ads in general, as well as questions about certain types of ads. The survey found that most of the surveyed users claim that there are too many ads on social networks in their opinion. So that means that many companies are active and classifying surveyed users into their target groups, although a large number of respondents disagree with the statement, "I usually run ads that I'm interested in as much as 40.5%. These data may indicate inadequate audience targeting by 35 advertisers while, on the other hand, too much "crowding the audience" is also not a good option. Testing the first hypothesis it turned out that video ads and image ads are equally popular, while presentations and image collections are significantly less popular. The second hypothesis testifies that a large part of the respondents bought a product under the influence of ads on social networks, which indicates the importance of the ad and their effectiveness. The third hypothesis is accepted, meaning that most users feel that there is a general benefit for both social networking users and businesses. The fourth hypothesis referred to the amount of text where it turned out that respondents to the same extent love content without a lot of text and a detailed description of the product / service indicating the different characteristics of the user and the different products / services that are suitable for one of these two types of communication depending on the characteristics of the products themselves. For high-quality ad, the most important is to select a target group and tailor the content to people who are advertising.