Alipin is a word that comes from the Filipino culture and is used to describe a type of slavery that existed a long time ago. It's a sad thing, but basically, there were people who were forced to work for someone else without getting paid or having much of a say in what they did.
Imagine you have a friend who really likes playing games. One day, your friend decides they want you to play games with them all day, every day. You don't really want to do this, but your friend says you have to or they won't be your friend anymore. You feel pretty stuck and don't know what to do. This is kind of like what being an alipin was like, but much, much worse.
Alipin were people who were owned by other people and had to work for them all the time. They didn't have any freedom and couldn't choose what they wanted to do. They also didn't get paid for their work and had to rely on their masters for their basic needs like food and shelter. It was a really difficult life and very unfair.
Thankfully, slavery like this doesn't exist anymore in most places, and people are free to choose what they want to do with their lives. It's important to remember the history of alipin so we can appreciate the progress we've made and work towards making sure everyone has access to freedom and equality.