Okay kiddo, let me break it down for you.
Eurodac is a big computer system that is used by countries in Europe to keep track of fingerprints of people who are seeking asylum.
When people come to a new country and ask for asylum, they have to give their fingerprints. This is because the system compares the fingerprints of the person to the fingerprints it already has in the system.
If the system finds a match, it means that the person has already asked for asylum in another country. This helps countries keep track of who has already asked for asylum and who hasn't.
Eurodac is important because it helps make sure that people who are asking for asylum are following the rules and aren't trying to cheat the system. It helps the countries in Europe work together to manage the number of people who are seeking asylum.