With the Lift and Shift method, applications are usually lifted 1 to 1 into the cloud. No changes are made to the application and the architecture is not adjusted. In the simplest case, a virtual machine is exported and imported into the infrastructure of the cloud provider and operated there.
This approach is used for fast and migration, e.g. when the local data center is abolished or the hardware no longer has a support contract, etc.
The cost savings achieved here are rather small and the scaling is done vertically, and the advantages of a cloud cannot be fully utilized.