Test locations identify the computer where the test suite will run.

There are 3 tabs: Overview, General Properties, and Eclipse Workbench Properties. The above screen capture shows the Overview tab information.
The General Information section provides the location's name (testLocation here), Description ('A sample location'), its path within the workspace (/java_01/testLocation.location), and the Host name (localhost).
The default host name for the location is localhost. If the intention is to run on another computer, enter the name of that computer in the Host name field.
Property Groups references General Properties and Eclipse Workbench Properties sections, which are also separately shown on the right-hand side of the Location editor overview tab view. Each references respectively the General Properties and Eclipse Workbench Properties tabs. both reference the General Properties tab. Clicking on the More... button in either the General Properties or Eclipse Workbench Properties sections switches to their respective tab views.
This is concerned with the setting of properties relating to the deployment of a TPTP JUnit Plug-in Test. It is covered in the help documentation describing TPTP JUnit Plug-in Test.
The functionality available here is identical to that described for the General Properties tab in the Artifact Editor.
Related concepts
Artifact Editor - overview
Deployment Editor - overview
Related tasks
Creating an artifact
Creating a deployment
Creating a location
Forming an artifact and location pairing