Scrolling harms memory because the brain never stays on information long enough to store it. Memory needs attention and repetition to move information from short-term memory into long-term memory. When you scroll, your brain jumps to a new stimulus every few seconds, which interrupts this process. The brain processes the content only superficially, so it does not encode it deeply. Over time this weakens recall, makes it harder to retain what you read or learn, and trains the brain to skim rather than remember.