What is the difference between showing a story and telling it?

I am confused,people are telling me I need to tell a story rather than show it. Isn't the point of writing a story to show what is happening and the fact that your writing it should mean your telling it.
Update: Thats extremely boring to say he was hungry I'd rather read the part showing he was hungry
Update 2: You guys dont understand, people are telling me to TELL a story rather than show it. Isn't showing it better?
4 answers 4