What does this code means? ScriptInclude "CMSEntryPage"

[Asami]

The property "glide.entry.page.script" has value as "new CMSEntryPage().getEntryPage()"

I checked the script include "CMSEntryPage". But it has a code which I am not able to understand.

what does this code means?

<CMSEntryPage>

var CMSEntryPage = Class.create();

CMSEntryPage.prototype = {
  initialize : function() {
  },

  getEntryPage : function() {
    var config = GlideContentConfig.get();
    if (!config.getLoginPage())
        return null;

    return new GlideCMSPageLink().getPageLink(config.getLoginPage());
  }
}

[Saurabh Gaikwad]

Hello Asami,

I know the little bit thing about this , having user with impersonator role, when it logs in it is getting redirected to service portal.(auto-redirect). it means when your log in then it will get auto redirect to service portal.

mark ???? Helpful if applicable 

Regards,

Saurabh,