Widsith is an old story song that was sung by the Anglo-Saxon people a long, long time ago. It's like a really long poem that tells stories of warriors and kings and the things they did. Think of it like when you play pretend with your friends and you each take turns telling parts of a story to make a really cool adventure, just like that! The people who sang this song would travel from place to place and sing it for people to enjoy. They would add their own stories and make it even longer and more exciting. So, Widsith is a really old song full of adventure and excitement that people used to sing a long time ago to tell stories and have fun.