It is said 80% of business owners will use chatbots in the future. Chatbots become more and more popular in terms of business, that is why it is necessary for businesses implement innovative approaches to provide customer service twenty-four hours. Such business especially is needed in terms of the challenging Covid-19 times. Artificial Intelligence-powered chatbots can work as intelligent teaching systems, for providing a personalized way of learning for students. Chatbot reviews student’s responses and his learning progress. One of the most convenient features of chatbots is the opportunity to send lecture materials in the form of messages to students as if it is just a chat with a friend. Apart from personalized chatbot usage in the studying process, it can be used to streamline business processes, e.g., such as sales. Nowadays chatbots are able to help customers to search products they need, place orders to the cart and pay for it, and track delivery processes of orders. Chatbot intelligence is being developed every day and every year now, so very soon chatbots will be able to perform even more difficult tasks to make the life of the user easier. In this paper, authors will deliver theoretical materials and historical background of chatbots, describe classification and techniques of chatbots, then describe the modern development trends of chatbots using artificial intelligence (AI), and finally discuss the role of chatbots in education and e-commerce.