Many feeds contain both a) Summary and b) Full Content elements for each item in the feed. The Summary element usually contains a brief synopsis of the feed item and often contains no images. Whereas the Full Content field generally contains the full text and graphic content for the item.
Depending on which text / images you want dlvr.it to post on your behalf, you can set dlvr.it to a) Prefer Summary Content (looks for Summary first, then falls back to Full if there is no Summary field), or b) Prefer Full Content (looks for Full first, then falls back to Summary if there is no Full field).
