Hi Paneendra,
Artifacts are stored in the following location during deployment.
Execution Server : <ReleaseAutomationInstallDir>\artifact-store\<releaseId_xx>
Agent : <ReleaseAutomationInstallDir>\NolioAgent\artifact-store\<releaseId_xx>
Artifacts are always removed from the artifact-store once deployment is complete as outlined by others.
If you are still seeing artifacts in the store post deployment, I recommend you to open a support case for further investigation.
Regards,
Lenny