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A collection of terms often used when talking about Jamstack and associated web technologies.

Immutable deploys

While a "mutable" item can change (be mutated) over time, an "immutable" item cannot. Once created, an immutable deploy of a website becomes an artifact which will not change. Instead, deploys result in new versions or instances of the site, and traffic is routed to them accordingly.

When paired with atomic deploys, immutable builds make it possible for sites to enjoy abilities such as instant rollbacks and versioning, and help to ensure that the code and assets of a website can be maintained in a known state.

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