What is Scratch org in Salesforce?

Hi
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. 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 orgs 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. 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.