The article examines the role of small, medium and large enterprises in the economy of Republic of Srpska for the period from 2014 to 2022 year. The authors analyzed the economic indicators, according to company size (profitability rate, labor costs per employee,  added value per employed person – productivity, employees – annual average and average wages paid per employed person), and also annual business indicators by company size (number of entrepreneurs, number of employees, number of companies and turnover). The aim of the paper is to analyze the operations of SMEs in order to give recommendations for future business improvement and to indicate the main obstacles and weaknesses as well as recommendations. The method of description and classification of data and the method of analysis and synthesis were used in order to achieve the objectives of the research.

In order to determine the most effective method of advertising on Instagram and attract users of the application to become permanent followers of the site, for the purposes of this paper, we used primarily collected data through weekly testing of seven selected methods. Five organic (increasing the number of followers and interactions – removing inactive followers, tracking posting time, changing the number of “tags”, “liking” other users’ content and a combination of 4 “likes” and 1 comment) and two paid directly from the Instagram application (foreign advertising and advertising for the domestic market). The results of the research were processed by descriptive statistics. The paper represents the synergy of theoretical and empirical work. The first part will theoretically describe facts related to the second, empirical, part of the paper and the case study, which was designed and researched. The idea stemmed from the need to select the most successful methods from the large number of the ones used to organically increase the number of followers and the number of interactions on the site. There was also a need to check whether these methods were as good for advertising as they were paid for. Also, it was necessary to determine whether they bring results in relation to the invested engagement. Comparing the achieved results of organic and paid advertising methods, it was found that certain organic advertising methods give better results in some parameters than paid ones, while paid ones give better results in other parameters.