If you want to get your work seen by as many people as possible, the web is the way to go. Couple that with the flexibility of the Adobe PDF format and you have a winner...
Adobe’s PDF format has beaten off the competition to become the de-facto portable document format. While Microsoft Word might be slightly more ubiquitous, it lacks PDF’s ability to look exactly as the author intended on pretty much any platform you care to mention.
For designers creating a portfolio, this is a hugely important factor in an industry where presentation is just as important as the work on display. Users who have downloaded Adobe Reader software also have the ability to view PDFs inline without having to leave their browser, which means that PDF portfolios no longer have to be emailed but can live on a server somewhere. All you need to do is email the link.
The PDF format has quite a few tricks up its sleeve, such as the ability to incorporate complex interactivity, featuring buttons and links, and the ability to embed audio and video in addition to images. Using the easy-to-use Acrobat Professional application, it’s possible to completely control how users see your document.