How can I track my marketing success for my B2B site?

You can direct your marketing to an Informational site that will provide them the information about the products and company, and get the users interested in signing up to be a customer. There are few things I am listing below that will allow you to achieve this:
 
 
  1. You can create a form on your informational site that takes their information and the form response gives them the link to the B2B sign up page. Click here to get more information on creating a form. 
 
  1. For the customers that are already signed in, and visit the site you can add a universal login. But this option will allow the customers to login only, the new user will not be able to signup if universal login is turned on. For those customers they will need to fill out the form and go to the B2B site to create their account. Click here to get more information on universal log-in.