Welsh archaeological trusts are organizations that work to protect and learn about the history of people who used to live in Wales a long time ago. They have special teams of people called archaeologists who dig up the ground to find old things, like buildings, tools, and bones.
The archaeologists then study these things to learn more about what life was like in the past. Sometimes they find things that are very old, like dinosaurs, and sometimes they find things that are not so old, like things that were used by people who lived hundreds or thousands of years ago.
The Welsh archaeological trusts are important because they help us understand our history and where we come from. They also help to protect and preserve important archaeological finds and heritage sites so that they can be enjoyed by future generations. Without these trusts, important parts of our history might be lost forever.