The bot specifies a manipulation to be applied to the medium when search engine bots are visiting.

Its goal is to optimize SEO by always giving the same image to the search engine bots even if they emulate different devices.

The syntax is a slash-separated list of  TwicPics API transformations.

In the example bellow,bothas been set to "cover=400x400".

While regular visitors will receive different variants depending on their browsing context, search engine bots will always get a 400 pixels wide, 400 pixels high version of your image.

Sets your browser's user agent to a bot engine value  to see how bots will perceive the images. Note that context changes then have no effect on the delivered image.