In this final paper we will prove that the selected concepts do not have a clear boundary in the business of digital software agencies, and in the IT sector. We will also show through this work how certain tools and strategies are used in the selected branch. The whole work is written based on the practical experience of working in Dings Solutions. The IT sector itself is quite complex, but for the sake of continuous expansion and increasing demands for it in the daily performance of certain tasks, the demand for good professional staff is high. Good professional specialist brings better competitiveness in the market, which grows faster every day. Through this work we defined the selected concepts, in order to better understand the diversity in the IT sector, and to the needs of the already mentioned branch. In larger corporations and organizations, there is a clear boundary between marketing, Public Relations, sales, while in IT other rules are applied, but the same theory. The biggest problem between IT professionals, marketing professionals, Public Relations experts and Sales professionals is a language barrier, while the biggest problem between marketing professionals, Public Relations professionals and Sales professionals in IT is the vague definition of business and tasks, is overlapping jobs, confusion in the field of searching for specialist specialists.