Seriation is like putting your toys in order. You can put them smallest to biggest or by color. In archaeology, this means putting ancient things in order from oldest to newest. By doing this, we can understand how people lived in the past, what they made, and how they changed over time. It's like making a timeline of people's lives, but instead of names, we use objects like pots, tools, and bones. So seriation helps us learn about history and how things have changed over time.