When you use Pinterest images on your website without proper permission, you could face a copyright strike as well as the possibility of DMCA takedown requests and legal action.
Proper credit and authorization must be given for use of images by professional photographers or artists, as such unauthorized use violates intellectual property laws.
Embedding images directly from Pinterest via its built-in embed feature may be acceptable, provided the source is linked.
The website content should only consist of stock images obtained through licensing or visuals created in-house, as these methods completely eliminate copyright risks.