Artificial Intelligence (AI) has affected different functions of businesses including Human Resources, and particularly, recruitment processes. With Chatbots (conversational agents) systems in place, HR can perform tasks like identifying, selecting, and interviewing talented candidates quickly and efficiently. This study offers an overview of the current state of chatbots usage in recruitment and selection processes. For doing this, we performed a literature review. We have retrieved academic articles from Scopus and Web of Science until March 2022. Also, we complemented the information retrieved with several searches on Google so as to find interesting grey literature and information. First, we define a chatbot and discuss its technical and social requirements. Second, we explain how chatbots are currently used in R&S processes in organizations, their benefits and their cons. By doing this, we seek to give AI and NLP developers valuable insights when creating chatbots for recruiting objectives.