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Why would clients find this useful?
All 3 of the above can find this useful as long as they have a situation where serve any content.
An example of how it would be implemented?
Clients, there are many use cases for them as the white paper library doesn't just cater for the traditional technical papers.
It can be applied to lots of different scenarios be it distributing brochure or any type of pdf the user wants to serve in an exchange for lead data.