The Interest Explorer tool is a database of over 10 million interests that Pinterest has in its database.

Interests = A topic that Pinterest associates with pins and people.

Pinterest tries to match interests in a user's home feed and searches.

So it's important that your pins target interests, and we give Pinterest a lot more confidence in what our pins are about.

Here's how I use the Interest Explorer tool to research sub-topics and words to include in my pins for a blog post topic I'm ready to cover: