I've just been reading the latest technology news on the BBC site and have found that Yahoo will be putting adverts into PDF files.

This is the first time that Adobe have let dynamic adverts appear in this useful universal document format, and it could spell an interesting change for marketers.

I haven't been able to find a great deal of information on how this work yet, but from the brief report on the BBC site is seems that it will be the people that publish the PDF that choose whether or not an advert appears in it.

I suppose that this opens up a new market for people that are regularly publishing PDFs, perhaps giving them away for free and are now looking for a new revenue stream. I know that most PPC marketers that I speak to are wary about putting too much budget into any form of content network, so it may be interesting to see who targets their ads for these locations.

We'll keep our eyes peeled to see how this pan's up and I'll maybe do an update in the future when there is more information about.