Project owner means that the project belongs to the person mentioned. Project owners is a virtual group in which you cannot add members or other groups in it. The project owner provides access rights to allow permission on the project to different groups.
You can view the access rights of your project using the following steps.
Step 1 − Open Gerrit dashboard by clicking this link.
Step 2 − Click Projects → List option. Search the project in your project list and click it as shown in the following screenshot.
Step 3 − When you open your project, click the Access option as shown in the following screenshot.
Step 4 − Click the edit option. You can change the access rights by clicking the dropdown menu. Click the Save Changes button as shown in the following screenshot.