Future employers? Potential clients? Home cooks? Hand-knit sweater buyers?
This question sounds simple, but it's anything BUT. Or, another way to put it is: answering simply is not easy.
Let's take Skillcrush for example. We want everyone to use our site! Ladies, gentlemen, kids, Corgis...
But how do you design a site for everyone?
You can't! So you have to pick one person and design it JUST for them and trust that, as long as you don't do something silly like write "Hi, Sally in Chicago! This site is ONLY for you." across the top, you'll end up with an awesome site that actually speaks to quite a few more people.
Today you'll start to figure out who your user is by learning all about user personas and how to use your user personas to determine your website's sitemap and user flows.