Because SmartFrames are rendered using <canvas>, they are not readable by social networks.
This allows for a small customized thumbnail – ie a small JPEG generated from the original image – to be served in image search results.
You can adjust the maximum size of the thumbnail that will appear in the image search. There are three thumbnail widths to choose from: Small (200px); Medium (400px); and Big (600px).
You can also add a custom watermark to the thumbnail to further protect your image.
These settings are global and will apply to all your embeds. This also means that if you disable search engine indexing, none of your SmartFrames will be indexed or visible in image search results.