The lower palaeolithic is a really long time ago, even before your great-great-great-great grandparents were born. This was a time when people first started using tools made out of rocks, sticks, and other things they could find. They used these tools to help them survive in the wild and gather food.
During this time, people would live in caves or shelters made out of branches and leaves, and they would hunt animals like woolly mammoths and saber-toothed tigers for food. They would also gather fruits and nuts from trees and bushes, and sometimes they would fish in rivers and lakes.
The lower palaeolithic is important because it was the beginning of human history. It's when people started to develop and use tools, which helped them to survive and eventually thrive. It's like when you learn how to use a fork and knife - it makes eating your dinner a lot easier!
Today, archaeologists study the lower palaeolithic to learn more about where humans came from and how we evolved over time. It's kind of like putting together a puzzle - they look at clues and evidence to try and figure out what life was like for people thousands of years ago.