This module is just the opposite as Blockfield. It converts a field into a block. For example, you can show an image of a content type somewhere in a block instead of between the other fields. This can be useful and is actually a kind of 'light' Panels or Display Suite.
You can choose which entities you want to use as a block.
Then you go to the blocks (at structure) and place a block. You see Field as Block.
Clicks show all fields of all content types. You choose one and you do the same settings as with a field view.
Do not forget to switch off the field when displaying your content type. Other you see it twice. Here you see the image of 'Article' in the right part of the block.