Problems with Microsoft Partner Login?

Hello Everyone!
Have you tried using the Microsoft Partner Login in your web page? Can you please tell me where to get a Microsoft partner login? How will I able to use it on my website? Do I need to buy it? Is it for free? If not how much is the current cost of Microsoft partner login? Is it worth to use Microsoft Partner login? What are the benefits that you get into using it? Can you please give me guidance. Any help will be much appreciated.
Thanks!
