Hi @agomrex and welcome to the PBC!
Thank you for your interest in promoting with Pinterest!
As an advertiser on Pinterest, you can categorize your Pins into ad groups that target your business goals. Running a successful ad campaign can help you gain a loyal following of people on Pinterest and drive people to your website. Check out our Becoming an Advertiser on Pinterest article to help you understand the structure of campaigns, how to create a goal for your campaign, and more.
Keep up with the Community to get advice from other businesses on Pinterest, and visit our Business site blog to get a few tips on how to get started.
Give us a shout if you have any questions!
As an add-on - you might also want to check the Pinterest Academy
There is a ton of great information you can learn at your own pace and get your badge when you have completed the courses on Advertising.
When you log in, you use your regular login credentials.
Hope this helps.