[GraphQL Basics course] [Main Task] [Atul]

Please start by reading the documentation, related to GraphQL: https://www.howtographql.com/
After reading each chapter - please briefly explain to me here what did you learn from it.
Format(example):

#### Chapter 1: Intro (https://graphql.org/learn/)
"It's covering the basics of graphql"
Questions: "How i can run it at my local PC"?

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You can grab it @atulkgupta9

Start with the GraphQL learning material at https://www.howtographql.com/ and read each chapter. For every chapter, post a brief explanation of what you learned and any questions in this issue using the format shown in the task. Done means all chapters have been covered in comments.

Written by the indexing model from the issue text.