Okay kiddo, so an aoidos is someone who sings stories, kind of like a musical storyteller. They're kind of like a mix of a singer and a storyteller who tells the story through song.
In ancient Greece, people didn't have the internet or books to read, so they would have aoidos come and sing stories for them. These stories were about myths, legends, and famous heroes from long, long ago.
The aoidos would sing the stories using a special kind of singing called "chanting" and usually played an instrument called a lyre to accompany their singing. They would travel from town to town to share their stories and were highly respected in ancient Greek society.
So, basically, an aoidos is like a really talented musician who sings stories for people to enjoy and learn from.