When users open a new tab page, they can choose whether the new tab opens a blank page (about:blank), the first page of their ...

When users open a new tab page, they can choose whether the new tab opens a blank page (about:blank), the first page of their home page set, or the new tab page. This policy setting allows you to specify what is displayed when a user opens a new tab.

If you enable this policy setting, you can choose from the list which page to display when new tabs are opened: new tab page, about:blank page, or the user's homepage. 

If you disable or do not configure this policy setting, users will be able to select their preference for this behavior. The new tab page is the default setting.