
A portfolio needs to focus on featuring images that will get you the job.
That’s one of the reasons I prefer a .pdf, complete with all the artist’s contact info on the first page and their name as part of the file name. This gives the artist a chance to go through material and choose only the stuff they need me to see. If they choose poorly, that tells me how they think and is a signal they may not be ready or easy to work with.
The other reason I prefer receiving a .pdf is that it’s easy to circulate to my managers, to clients if we take you on, and to keep on my computer for immediate reference.