Okay, kiddo! So, topicalization is when we move a word or group of words to the beginning of a sentence so that we can talk about it first.
Imagine you went to the zoo and saw lots of animals like lions, tigers, and monkeys. If you wanted to talk about the monkeys first, you would say "Monkeys, I saw at the zoo." This is called topicalization because you're highlighting the monkeys by talking about them first.
We can use topicalization to help the listener or reader better understand what we're talking about by bringing it to their attention right away. It's like pointing at something and saying "look at this!"
That's pretty much what topicalization is, kiddo. It's a way to emphasize or highlight something in a sentence by moving it to the front.