DFP(Double Click for publisher) previously or in past it is known as Google Dart, DFP Small Business is an advertisement service run by Google. It is freely hosted ad service provides divers features which is very useful for managing process of online ads such as:
elegant ad trafficking and delivering,
There are different types of adds available in DFP or we can call it line items based on priority:
Standard (default setting)
There are still a lot more things left to explain about DFP, its advantages and features, for more on DFP ads and line item type, I will provide it in my next blog, or you can also visit the site directly, doubleclick for publishers.
Some more helpful links and search options you can visit: