Interfaces are part of our daily life, and we navigate in a simple and instinctive way on them. However, these interfaces can be at the heart of manipulation and influence, directing our choices towards unwanted acts. This research aims to denounce and make us interrogate the stakes of what we can call darks patterns. Based on different article dealing with the influence of the interfaces, the research addressed the bad influence they can have on us, their impacts on our decisions, and their misleading nature. To highlight finds, TikTok app is chosen, one of the most installed applications in the world, to detect the dark pattern of its interface. The research indicates that interfaces have a big impact on the way we use the internet. Because of a too much habit of codes, institutes at the web beginning. Reflexes developed, lead ill – intentioned UI/UX designers to take advantage by making a deliberate bad design to mislead and bring us where they want. On this basis, interfaces have a big influence on actions doing. If ill-intentioned designers decide to deceive people, many of them will fall in the trap. Except that the responsibility designer isn’t really engaged, it depends on the employer who orders the design.