There are multiple methods for displaying a website project in your portfolio, with pros and cons to each. This is a very frequent question as far as I’ve seen. Many people are unhappy with flat screenshots, and want to show something more. So they wind up thinking about WordPress multi-site and other very complicated solutions — but there are easier ways to display your projects in web development portfolios.
These are skills you might find useful as a freelance web developer. You’ll notice they are not relevant to actual web development. If you’re working in a larger environment, it can still be useful to note the basics of these: someone who understands basic limitations of other people’s jobs is usually easier to work with, and can sometimes provide cross-disciplinary insight. However, in a larger organization you’ll also probably have another person — if not a department with multiple teams — to worry about these things, so it’s not as crucial.
One of my friends needed a website for a business he wants to start. I threw this together for him in ~5 hours. I started around 8 PM and finished around 1 AM, from getting the information to closing down all of my tabs.