While many people are happy when images from their websites get “pinned” on Pinterest, there are many times that you might not be so pleased. You may have a need to prevent images from being shared for copyright or similar reasons, or simply not want the extra website traffic.
Thankfully, you can stop this with the addition of a simple HTML META tag. Also, if you already use CloudFlare, they can add it for you at runtime!
<meta name="pinterest" content="nopin" />