A) HAVE A BUSINESS ACCOUNT
You would want to create a business account for Pinterest. Not only setting up a business account will enable you to perform analytics on your Pinterest account, it will provide you the ability to use Pinterest advertising. Pinterest advertising has a section that will help you determine popular keywords in Pinterest which I will discuss later in the post.B) USE SEARCH BAR
There are two ways to utilize the search bar. Similar to google, when you search for a keyword in the search window, it will give you a list of frequently searched keywords. For example, let's say you are trying to create a content related to gardening. When you type in 'Gardening' in the search window, Pinterest would show a list of other words that are frequently searched together.

C) USE PINTEREST AD
If you are a business user (And you should as I explained in Step A above), you have access to create an Ad in Pinterest. When you create an ad, there is a section to add 'keywords' as below. When you type in 'Gardening' as the keyword, Pinterest also shows you a list of frequently searched term that's related to 'Gardening'.
