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sathishkumar periyasamysathishkumar periyasamy 

What is mean by Scratch org in SalesforcDX?

 My understanding is cloning my production or sandbox environment in to temp org. is that true?
NagendraNagendra (Salesforce Developers) 
Hi Sathish,

Scratch Orgs: The scratch org is a source-driven and disposable deployment of Salesforce code and metadata. A scratch org is fully configurable, allowing developers to emulate different Salesforce editions with different features and preferences. And you can share the scratch org configuration file with other team members, so you all have the same basic org in which to do your development.

Scratch org's drive developer productivity and collaboration during the development process and facilitate automated testing and continuous integration. You can use the CLI or IDE to open your scratch org in a browser without logging in. You might spin up a new scratch org when you want to:
  • Start a new project.
  • Start a new feature branch.
  • Test a new feature.
  • Start automated testing.
  • Perform development tasks directly in an Org.
  • Start from “scratch” with a fresh new Org.
For more information please check with below link: Please let us know if this helps.

Kindly mark this as solved if the information was helpful.

Thanks,
Nagendra