How to view build information?

You can view the Set Default Build and last executed build to know which product/software version has been tested. Click on the information icon to expand the information of -

Current set build (i.e. set default build): The build set as default in the Build module. This is a test suite level build. You can change the build at test suite level and the same is displayed as Current set build until you refresh the execution screen.
Last executed build: The build set for test cases on execution screen and on which the test case(s) are executed.