The European Survey Research Association is a group of adults who work together to learn more about people and their opinions in Europe. Just like how a teacher might ask you questions in class, these adults ask questions to people all over Europe to learn more about important topics. They might ask questions like "What do you think about education?" or "What's your favorite food?"
The adults use different tools to ask these questions, like online surveys or even going door-to-door to talk to people in person. They then collect all the answers and put them together to make graphs and charts to help them understand the answers better.
This information can be really helpful for lots of people, like government officials who want to make better laws or companies who want to know what customers want to buy. The European Survey Research Association is like a big group of detectives who work together to learn more about people and their opinions in Europe.