Pinterest, in a blog post has announced that if a user has enabled browser's Do Not Track feature, then it will support it. It means that the site won't be collecting or tracking your activity. However, while that stays true, Pinterest will still show you suggested pins.
You must have noticed that Pinterest offers suggestions based on your activity. For example, if you're browsing pins of some celebrity or visited some websites that have the Pin It button, then Pinterest will show you more pins of that celebrity. Basically, it can be said that Pinterest learns from your activity/interest and then offers you just that. But fortunately there’s a way to opt out of this new personalization feature of Pinterest.
Steps to disable personalize feature on Pinterest
Login to Pinterest account via your computer's browser and then click on your name from the top-right corner of the screen, and choose Settings.
From this settings screen, toggle the Personalization feature to No. Scroll down and then click on the Save Settings button.
If you're on Android and iOS version of Pinterest app, then go to Settings menu and uncheck the option for "Send 3rd party analytics."
Well, from now onwards, Pinterest won’t suggest you personalized pins and boards anymore.