European Summer School in Information Retrieval is a summer course ran by European universities for students who want to learn about how to search for information on the internet. In the course, the students learn about different algorithms and techniques for finding what you are looking for. They also learn how to create and use databases. Finally, they practice using their knowledge to find the best possible information online. At the end of the course, they should be able to use these skills to conduct research, find relevant sources, and answer questions.