Explanation:

Box 1: Build the code in the DevOps pipeline.
Box 2: Asset library
Run the export to the Asset library in Microsoft Dynamics Lifecycle Services (LCS).
Box 3: Select Maintain and Apply updates.
eprovision the target environment
If you copy a database between environments, the copied database won't be fully functional until you run the Environment reprovisioning tool to make sure that all Commerce components are up to date.
Follow these steps to run the Environment reprovisioning tool.
* In your project's Asset Library, in the Software deployable packages section, click Import.
* From the list of shared assets, select the Environment Reprovisioning Tool.
* On the Environment details page for your target environment, select Maintain > Apply updates.
* Select the Environment Reprovisioning tool that you uploaded earlier, and then select Apply to apply the package.
* Monitor the progress of the package deployment.
Reference:
https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/database/dbmovement-scenario- exportuat#back-up-to-the-asset-library