It depends what you would like your workflow to be, if you want to package the output and deploy that seperately then you'll need to create a zip file from your build.
Create Package
Add the following to your msbuild command line to create a package:
/p:DeployTarget=Package
/p:PackageLocation=MyProject.zip
/p:CreatePackageOnPublish=True
Deploy Package
msdeploy.exe
-verb:sync
-source:Package=MyProject.Zip
-destination:auto:ComputerName="my.server.com"
You might also want to promote from one deployed site to another.
Clone Site
msdeploy.exe
-verb:sync
-source:appHostConfig="my.server.com"
-dest:appHostConfig="mynew.server.com"
Or you may already have a site that you want to target.
Clone Application
msdeploy.exe
-verb:sync
-source:iisApp="my.server.com/MyApp"
-dest:iisApp="my.server.com/MyNewApp"