Implicit data collection is a way for companies or websites to keep track of what you do online without you realizing it. It's kind of like when a teacher stands in the back of the room during class and takes notes about what people do. The teacher can see if people are paying attention or not, and the notes can help the teacher figure out what to do next. In the same way, when you are on the internet companies can track what actions you take and what websites you visit, even if you don't fill out a form or give them any information directly. This helps the companies learn more about their customers so they can create better products or services.