American Dad is a cartoon TV show where a family lives together in a house. The dad's name is Stan, and he works for the CIA (which is like a secret spy agency). The mom's name is Francine, and she's a stay-at-home mom. Their two kids are named Haley and Steve.
Every episode is a different adventure for the family. Sometimes they travel to different countries, sometimes they have to save the world, and sometimes they have to deal with everyday problems like doing homework or cooking dinner. There are also lots of other characters who appear in the show, like Stan's best friend who's an alien named Roger, and their pet fish Klaus who used to be a person.
The show is funny and has lots of jokes that might be a little bit too grown-up for kids, but mostly it's just silly and fun. People like American Dad because it's a good way to relax and have a good time.