To answer the question, what is Scrum, here you can find guides, articles, videos and much more to help you learn about Scrum.
https://www.scrum.org/resources/what-is-scrum
* The Scrum Guide * Scrum Glossary * The * Scrum Guide * Professional Scrum Developer glossary * Scrum Guide * download * Product Owner * Development Team * Scrum Master * The Scrum Guide * Forum * Blogs * Resources * read