As with any social media platform, the first step to using Pinterest is signing up for your free account. If you're not already a user, it's a good idea to join Pinterest for Business (companies already on Pinterest can convert their personal page to a business page here).
Pinterest business pages, introduced in 2013, have no obvious difference in the way pages appear to users. However, using Pinterest for Business gives you access to analytics that personal pages don't provide, including:
Social Media Examiner provides a detailed guide to making the most of Pinterest analytics.