What does supporting details mean ?

In january 2014 and i started 1 million pennies project she put donation jars in school and shops and set up a webpage to of said donations online her gold was to collect 1 million pennies or 1000 chandra’s planned to give the money to a group called growing food for the group plant gardens and deliver the products it grows to people in need

Pronoun clearly shows what is being referred to at specific person place or thing

Why is the use of summary particularly when analyzing dramatic works?